These are the only undies I buy for my kids. Fun colours, good-coverage fit, and easy to put on and off for little ones (those cheap chain-store undies can get so twisty!).
Kids Original Horses
Thunderpants organic cotton and spandex fabric is super stretchy, comfy and easy-fit. There’s no nasty, scratchy elastic that digs in. They are the ultimate comfy, easy-fit undie.
The flat fronted original, hipster and sky rise styles all have the same fit through the leg and butt varying in height. The hipster is low waisted, the original sits around the navel and the sky rise is high waisted.
The flat fronted boxer is a hipster fit with a short boy leg.
See the size guide below to help you choose the right size. If you happen to fall between the measurements, don’t panic! We recommend going up rather than down a size.....they will last longer and be more comfortable if not stretched too far.
The swimwear also follows this standard New Zealand sizing.
This chart includes all styles in the adult range that are not a pouch front but does not include the Cotton Drill A line skirts whose size chart is included in the product description.
| XS | S | M | L | XL | 2XL | 3XL | |
| 6 - 8 | 8 - 10 | 12 - 14 | 16 -18 | 20 - 22 | 24 - 26 | 28 - 30 | |
| bust cm | 67-77 | 77-87 | 87-97 | 97-107 | 107-117 | 117-127 | 127-137 |
| waist cm | 62-72 | 72-82 | 82-92 | 92-102 | 102-112 | 112-122 | 122-132 |
| hip cm | 76-86 | 86-96 | 96-106 | 106-116 | 116-126 | 126-136 | 136-146 |
| bust inches | 26-30 | 30-34 | 34-38 | 38-42 | 42-46 | 46-50 | 50-54 |
| waist inches | 24-28 | 28-32 | 32-36 | 36-40 | 40-44 | 44-48 | 48-52 |
| hip inches | 30-34 | 34-38 | 38-42 | 42-46 | 46-50 | 50-54 | 54-58 |
Flat Fronted Hipster vs Original/Sky Rise?
These styles are exactly the same in every way except the hipster is shorter in the waist than the original or sky rise. Those of us that have a bit of a tummy roll may wish to choose the original or sky high style as they cover the tummy.
Pouch fronted Boxer vs Brief?
The pouch front boxer is the closer fit option. If you like everything snug with a fitted boxer leg then opt for the boxer. For those that prefer a looser fit, stick with the brief.
| XS | S | M | L | XL | 2XL | |
|
cm
|
60 - 70
|
70 - 80
|
80 - 90
|
90 - 100
|
100 - 110
|
110 - 120
|
|
inches
|
24 - 28
|
28 - 32
|
32 - 36
|
36 - 40
|
40 - 44
|
44 - 48
|
What about the kids?
|
children |
small |
medium |
large |
|
age |
2 - 4 years |
5 - 7 years |
8 - 10 years |
Whoa Nelly! Clippity clop why don't you gallop away with this whinnying print by Greta Menzies.
These Kid's Original Thunderpants are super comfy and modest. Your cool kid can hang upside down on the jungle gym in a frock with confidence all their bum is still covered.
These are designed to be waist high in the small size for wee kids which makes them excellent toilet training pants. As the sizes get bigger the waist lowers a bit, but not a silly amount!
NB: These used to be called Girl's Original Thunderpants. All kids can wear this style and there is enough stretch in the fabric to accomodate different body shapes.
- Fit
- Fabric
- Care
-
Available in sizes small (2-4 years) medium (5-7 years) and large (8-10 years) this very comfortable brief sits in the natural crease at the top of the leg and around the high hip to navel area.
-
The Thunderpants fabric is 90% regeneratively grown cotton and 10% spandex to give it that super comfy, soft stretchy feel. The waist and leg bands are constructed in the same, lovely fabric eliminating the need for the addition of nasty, grippy elastic and adding to the enjoyment of your Thunderpants experience. All the garments are made locally and lovingly in New Zealand.
-
To preserve the vibrant colours and life of the fabric we suggest you do not soak or bleach your Thunderpants items. Use a gentle detergent in a cold machine wash and dry your Thunderpants on the line, not in the drier.
Your Thunderpants are not only super comfy but they are designed to withstand some pretty staunch stuff, so get into them and get on out there!
Made in NZ
Planet Friendly
Cheeky Goodness
Kids Original Horses
Customer Reviews
Overall rating: 4.9 / 5 from 59 reviews.
Super pants! Thanks for making comfortable and practical kids undies.
Jennifer 5/5 Verified
My five year old daughter was struggling with undies - tall the ones we tried were baggy and she didn’t like how they’d ride up. So after reading reviews I decided to try Thunderpants. They are awesome and my daughter loves them. They are super high quality and don’t ride up, with snug but comfy cuffs around the legs. And great patterns. And made locally. All in all a big win for us. Thanks Thunderpants 😊
Miranda 5/5 Verified
My four year old LOVES her “thunder undies”. They have been the solution to her refusal to wear undies at all. Thank god for Thunderpants!
Adrianne 5/5 Verified
When the girls were really little I inherited some Thunderpants from a friend who's preschooler had grown out of. They were still in great condition so I decided to only use these pants. They a great size for my petite wee girls. It can be quite hard to buy underwear for them that has the fit right around the legs so there isn't any gapping and that they stay up. These pants tick all the boxes.
Anna 5/5
I've been toilet training my two year old with these thunderpants. The bribery for using the toilet is she gets to wear her 'big girl' underpants. It has been very motivating for her and these pants have taken everything she has thrown at them with so much more wear left in them.
Anna 5/5
These are the only undies my girls wear. They are tight around the legs and stay up. No more builders crack! I've had so much wear out of all my Thunderpants. Thick fabric built to take what preschool life brings.
Anna 5/5
Excellent grunds for the 5 yr old as Captain Thunderpants. Usual high quality and service
Sylvia 5/5 Verified
My daughter loves them so much because they are comfy, soft and a good shape. They are constantly getting worn and washed, despite her hating pink. That's how much she likes the fit. It was a struggle to get this photo - had to quickly find a fresh pair before they were worn again :)
Kirsten 5/5 Verified
Best kids undies I've found. We are slowly building up a collection and they are sturdy enough to pass on once my girl has outgrown them. So good!
Abby 5/5 Verified
Great undies for my girl. They give full coverage while being comfy and fun!
Abby 5/5 Verified
My grandies really love their new knickers, very comfortable and don't fall down apparently 😅
Jenny 5/5 Verified
Soft fabric and comfort noted.
Tm 4/5 Verified
I bought these undies for my niece and she absolutely loves them!
Harriette 5/5 Verified
Best knickers, these are for my under two yr old grandie so when she goes into knickers the comfort bar is set suitably high
Lynne 5/5 Verified
Great product and service as always! 🌼
Tricia 5/5 Verified
Wonderful clothes and underwear here. The whole family wears them. My child has gone into the M size about a year before the age range, so beware that you might need to size up - good thing I bought plenty of these in advance!
Marie 5/5 Verified
Simply irresistible design and quality
Marie 5/5 Verified
My daughter loves the fun, bright colour, and loves that there's no scratchy product labels 🤩
Emma 5/5 Verified
There is a small person in the inner north of Melbourne who is very happy that she has another pair of her comfiest undies that are both pink and have hearts on them, got to love that!!
Lynda 5/5 Verified
Very comfy, last for ages. Survive many many washes in a very long toilet training journey!
Bronwyn 5/5 Verified
Bigger size this time for part of granddaughters birthday present, though she’s still wearing medium. TPs are definitely her knickers of choice, always picks them out to wear ahead of the others.
Lynne 5/5 Verified
Always good quality for busy toddlers through to funky grandmothers! Comfy, zany…fun!
Kathryn 5/5 Verified
Purchased for my 3 year old granddaughter and she loves them.
Donna 5/5 Verified
My grandchildren received these Bird of the Year pants as birthday presents this year. A good reminder of our native fauna for those currently resident in Aussie!
Alison 4/5 Verified
Bought four pairs in different prints for my granddaughter. Great fit, true to size. Wonderful quality. She likes them and so do her folks. Thanks.
Kathryn 5/5 Verified
Such gorgeous thundies for my moko, perfect fit and she looks so grown up in them.
Monique 5/5 Verified
These are just the cutest wee undies and I had to get a matching adult pair because who doesn't love veggies on their smalls? So comfy and cute, they're perfect for under the school uniform.
Katherine 5/5 Verified
Birthday girl looked very happy with her Thunderpants yesterday. Unfortunately I can't add the photo.
Alison 5/5 Verified
One of 2 pairs bought for 4.5yr old granddaughter. Who now waits for them to go through the wash so she can wear them in preference to her others, just like Nana does!. She’d recently got glasses, so it was a bonus to find the Specs print. Put another order in for 2 more pairs for her, which have now arrived xx
Lynne 5/5 Verified
These were for my daughter who will only wear Thunderpants products. She has plenty of spare pairs of briefs, as every time I see a new design I just have to buy it for her!
Vi 5/5 Verified
Brilliant quality and my niece just loves these! Thank you!
Michaela 5/5 Verified
Santa brought me, Mum and Stepdad matching Sausage Thunderpants for Xmas!! What a silly sausage Santa is 🙈🙈
Laura 5/5 Verified
I received my first pair of Thunderpants as a gift when my daughter was born. I was an instant convert and have worn TP originals ever since. My thirteen year old daughter is therefore a Thunderpants native and loves them as much as I do. Here we are, mother and daughter in matching tigers, spending the day with this underlying connection whatever our individual clothes and activities.
Rachel 5/5 Verified
My grandaughter loves these thundies!
Jane 5/5 Verified
My grandaughter loves this design
Jane 5/5 Verified
I have purchased some children's Thunderpants for my 3 year old Granddaughter. She loves them. Today I'm looking after her and when she arrived she said to me "Nana I am wearing my Thunderpants" I asked what did they feel like on and she said "They are so cosy" :)
Beve 5/5 Verified
My kiddo really loves his Thunderpants, really comfy, chafe free no matter what he rolls in at school or at play, and they have not faded or got mis-shapen despite much wear, love, washing, and many many stunts. You have worked out exactly what ThunderKids need !!! Love your stuff.
John 5/5 Verified
My Daughter loves her Thunderpants! Thanks!
Louisa 5/5 Verified
The second pair of Captain Thunderpants for a 6th birthday.Current pair i. good use.
Sylvia 5/5 Verified
Customer Reviews
Overall rating: 4.9 / 5 from 59 reviews.
These are the only undies I buy for my kids. Fun colours, good-coverage fit, and easy to put on and off for little ones (those cheap chain-store undies can get so twisty!).
Amy 5/5 Verified
Super pants! Thanks for making comfortable and practical kids undies.
Jennifer 5/5 Verified
My five year old daughter was struggling with undies - tall the ones we tried were baggy and she didn’t like how they’d ride up. So after reading reviews I decided to try Thunderpants. They are awesome and my daughter loves them. They are super high quality and don’t ride up, with snug but comfy cuffs around the legs. And great patterns. And made locally. All in all a big win for us. Thanks Thunderpants 😊
Miranda 5/5 Verified
My four year old LOVES her “thunder undies”. They have been the solution to her refusal to wear undies at all. Thank god for Thunderpants!
Adrianne 5/5 Verified
When the girls were really little I inherited some Thunderpants from a friend who's preschooler had grown out of. They were still in great condition so I decided to only use these pants. They a great size for my petite wee girls. It can be quite hard to buy underwear for them that has the fit right around the legs so there isn't any gapping and that they stay up. These pants tick all the boxes.
Anna 5/5
I've been toilet training my two year old with these thunderpants. The bribery for using the toilet is she gets to wear her 'big girl' underpants. It has been very motivating for her and these pants have taken everything she has thrown at them with so much more wear left in them.
Anna 5/5
These are the only undies my girls wear. They are tight around the legs and stay up. No more builders crack! I've had so much wear out of all my Thunderpants. Thick fabric built to take what preschool life brings.
Anna 5/5
Excellent grunds for the 5 yr old as Captain Thunderpants. Usual high quality and service
Sylvia 5/5 Verified
My daughter loves them so much because they are comfy, soft and a good shape. They are constantly getting worn and washed, despite her hating pink. That's how much she likes the fit. It was a struggle to get this photo - had to quickly find a fresh pair before they were worn again :)
Kirsten 5/5 Verified
Best kids undies I've found. We are slowly building up a collection and they are sturdy enough to pass on once my girl has outgrown them. So good!
Abby 5/5 Verified
Great undies for my girl. They give full coverage while being comfy and fun!
Abby 5/5 Verified
My grandies really love their new knickers, very comfortable and don't fall down apparently 😅
Jenny 5/5 Verified
Soft fabric and comfort noted.
Tm 4/5 Verified
I bought these undies for my niece and she absolutely loves them!
Harriette 5/5 Verified
Best knickers, these are for my under two yr old grandie so when she goes into knickers the comfort bar is set suitably high
Lynne 5/5 Verified
Great product and service as always! 🌼
Tricia 5/5 Verified
Wonderful clothes and underwear here. The whole family wears them. My child has gone into the M size about a year before the age range, so beware that you might need to size up - good thing I bought plenty of these in advance!
Marie 5/5 Verified
Simply irresistible design and quality
Marie 5/5 Verified
My daughter loves the fun, bright colour, and loves that there's no scratchy product labels 🤩
Emma 5/5 Verified
There is a small person in the inner north of Melbourne who is very happy that she has another pair of her comfiest undies that are both pink and have hearts on them, got to love that!!
Lynda 5/5 Verified
Very comfy, last for ages. Survive many many washes in a very long toilet training journey!
Bronwyn 5/5 Verified
Bigger size this time for part of granddaughters birthday present, though she’s still wearing medium. TPs are definitely her knickers of choice, always picks them out to wear ahead of the others.
Lynne 5/5 Verified
Always good quality for busy toddlers through to funky grandmothers! Comfy, zany…fun!
Kathryn 5/5 Verified
Purchased for my 3 year old granddaughter and she loves them.
Donna 5/5 Verified
My grandchildren received these Bird of the Year pants as birthday presents this year. A good reminder of our native fauna for those currently resident in Aussie!
Alison 4/5 Verified
Bought four pairs in different prints for my granddaughter. Great fit, true to size. Wonderful quality. She likes them and so do her folks. Thanks.
Kathryn 5/5 Verified
Such gorgeous thundies for my moko, perfect fit and she looks so grown up in them.
Monique 5/5 Verified
These are just the cutest wee undies and I had to get a matching adult pair because who doesn't love veggies on their smalls? So comfy and cute, they're perfect for under the school uniform.
Katherine 5/5 Verified
Birthday girl looked very happy with her Thunderpants yesterday. Unfortunately I can't add the photo.
Alison 5/5 Verified
One of 2 pairs bought for 4.5yr old granddaughter. Who now waits for them to go through the wash so she can wear them in preference to her others, just like Nana does!. She’d recently got glasses, so it was a bonus to find the Specs print. Put another order in for 2 more pairs for her, which have now arrived xx
Lynne 5/5 Verified
These were for my daughter who will only wear Thunderpants products. She has plenty of spare pairs of briefs, as every time I see a new design I just have to buy it for her!
Vi 5/5 Verified
Brilliant quality and my niece just loves these! Thank you!
Michaela 5/5 Verified
Santa brought me, Mum and Stepdad matching Sausage Thunderpants for Xmas!! What a silly sausage Santa is 🙈🙈
Laura 5/5 Verified
I received my first pair of Thunderpants as a gift when my daughter was born. I was an instant convert and have worn TP originals ever since. My thirteen year old daughter is therefore a Thunderpants native and loves them as much as I do. Here we are, mother and daughter in matching tigers, spending the day with this underlying connection whatever our individual clothes and activities.
Rachel 5/5 Verified
My grandaughter loves these thundies!
Jane 5/5 Verified
My grandaughter loves this design
Jane 5/5 Verified
I have purchased some children's Thunderpants for my 3 year old Granddaughter. She loves them. Today I'm looking after her and when she arrived she said to me "Nana I am wearing my Thunderpants" I asked what did they feel like on and she said "They are so cosy" :)
Beve 5/5 Verified
My kiddo really loves his Thunderpants, really comfy, chafe free no matter what he rolls in at school or at play, and they have not faded or got mis-shapen despite much wear, love, washing, and many many stunts. You have worked out exactly what ThunderKids need !!! Love your stuff.
John 5/5 Verified
My Daughter loves her Thunderpants! Thanks!
Louisa 5/5 Verified
The second pair of Captain Thunderpants for a 6th birthday.Current pair i. good use.
Sylvia 5/5 Verified