Small Toddler Underwear for Potty Training & EC’d Babies


Noble Bebe Toddler Underwear EC Peesy

Are you searching for small toddler underwear for potty training? Or tiny underwear for your baby practicing elimination communication? We've got you covered!

Whether you are looking for the smallest toddler underwear or organic toddler underwear, we have recommendations for you.

Our list includes boys briefs, boys boxers, and girls undies. There are brands of extra small underwear for petite toddlers, starting from sizes 18 months or 12 months. Even baby underwear from size 6 months!

Disclosure: This post contains affiliate links. If you click on an affiliate link and make a purchase, I will earn a small commission, at no extra cost to you. Thanks for your support!

Brands of Small Toddler Underwear

Komfi Baby - Organic Cotton Underwear

Komfi Baby offers organic cotton underwear for babies and toddlers. They have both briefs and boxer styles. As the name suggests, these small underwear are super comfortable!

Even my newborn baby was able to wear Komfi Baby underwear while practicing elimination communication!

My daughter wore Komfi Baby girl's briefs into toddlerhood and I was really sad when she outgrew 2T/3T. It was hard to find anything with comparable quality and fit. Now they've extended the sizing to 4T/5T!

Highly recommended!


Sizes: 12M - 4T/5T (These ran small, but the sizing has been updated, so check the size chart.)

Fabric: 100% Organic Cotton

Shipping: Free Shipping over CAD $99 to Canada and USA!

Made in: South Korea

Coupon: Save 10% with coupon code ECPEESYKOMFI

Tiny Undies - Elimination Communication Underwear

Tiny Undies offers cotton underwear, boxers, and training pants for babies practicing elimination communication, as well as potty trained toddlers.

The Mom behind the brand, Andrea Olson, is author of Go Diaper Free: A Simple Handbook for Elimination Communication and The Tiny Potty Training Book.


Sizes: 6M - 5T (These run small and shrink if washed on warm/hot, so check the size chart and consider sizing up.)

Fabric: 100% Cotton

Shipping: Free shipping on USA orders over $65

Made in: China

Coupon: Save $5 on your order from the Tiny Undies website with coupon ECPEESYTINY

Noble Bebe - Preflat Diapers + Big Kid Undies

Noble Bebe Underwear or Training Pants
Noble Bebe Two Layer Toddler Kids Underwear

Noble Bebe is known for their brightly colored preflat cloth diapers. Reina uses the same stretchy bamboo French terry fabric for sewing big kid underwear. They have a unique design, with two separate layers. This allows you to add absorbency between the layers. So they can be used as absorbent cloth training pants and then regular underwear.

I loved that the design allowed me to use these as training pants, while still being easy to wash. But at the same time I wished the layers were sewn together around the leg bands. I would prefer a pocket opening at the back to allow for adding absorbency.

These were super comfortable and cute. I just wish my son hadn't outgrown them so quickly! I think they shrank with washing on hot. Be sure to measure your child and check the size chart.


Sizes: 18M - Kids 12 (My son outgrew size 18M by 12-months-old.)

Fabric: Stretchy bamboo rayon French terry

Shipping: Ships from USA

Made in: USA

*If these are showing as out of stock, you may need to wait for the next stocking. Check Instagram for updates @noblebebediapers.

City Threads Underwear - Made in the USA

City Threads is one of my favorite brands of toddler underwear for boys. I'm not as much of a fan of the girl's briefs. The boys underwear are available as either briefs or boxers.

These are high-quality and made in the USA. You can choose from thick 100% cotton or 100% organic cotton.

Size 18-24M fit my petite son from the time he was 2-years-old until he was 3-years-old.


Sizes: 18-24M - 4T

Fabric: 100% Cotton, or 100% Organic cotton

Shipping: Free shipping with Amazon Prime

Made in: USA

Little Lupine Company - Etsy Shop

I recently found the Little Lupine Company Etsy shop! I hope to try these adorable organic cotton underwear on my youngest child once he is ready for underwear. I love the ocean inspired prints.


Sizes: 1 Kids (similar to 1T one-year-old) to 12 kids

Fabric: 100% organic cotton

Shipping: Ships from Alaska, USA

Made in: USA

Sew Yeti - Etsy Shop

Sew Yeti offers small underwear for babies and toddlers. Perfect for elimination communication, Montessori toilet learning, or potty trained toddlers. Many different bright bold prints are available. The wide waistband and leg bands look very comfortable. 


Sizes: 9M - 10 kids 

Fabric: Organic cotton Lycra

Shipping: Ships from USA

Made in: USA

That wraps up our list of small underwear for babies and toddlers. Next, you may want to see our list of potty training resources.

About Heidi Avelino

Heidi is passionate about spreading awareness of elimination communication and natural cloth diapering. She is an environmentalist and strives to live a minimalist and zero-waste lifestyle. Heidi practiced EC with each of her three children. Her eldest son and her daughter have reached potty independence. She is currently practicing EC with and cloth diapering her youngest son.