Tween sizing guide tips

tween sizing

Shopping for your tween?

Here’s our tips to the Cosabella Tween sizing guide

Buying your first bra is a huge milestone for any young girl. It’s the first significant step into womanhood, and it can be a bonding experience with her mom.

We understand how meaningful a woman’s first bra can be, which is why we developed the tween line, Bella by Cosabella, for young girls everywhere.

tween sizing

While other stores that carry tween underwear may base their size ranges on ages, we chose to design our pieces by size, since every girl can be a different size at a certain age. It may be confusing at first, but we actually love having a more expansive size range this way!

So, without further adieu, here’s our tips to finding the right size for your tween.

tween sizing

Tween Sizing Guide: Tips & Tricks

If you’re shopping our Bella by Cosabella collection for tweens, use these guides below to find the best size.

tween sizing

Tops & Camis


Tops and camis within the Bella by Cosabella tween collection run from size Small to Extra Large.

For these pieces, it’s important to understand the measurement of the chest circumference. Wrap a measuring tape around the widest point of the chest to get this measure.

Our tween tops and camis are full coverage and include a built-in shelf bra. They are the perfect everyday piece and are sure to be a staple in any girl’s wardrobe.

avi racerback camisole

The Ana Racerback Camisole is a great, comfortable option for any day.


Bralettes are sized from Small to Extra Large.

Like tops and camis, bralettes depend on the sizing around the chest. In addition, you’ll need to measure around the upper ribcage, where band of the bralette will sit (this is known as the band size). Be sure to check this well to find your tween’s true fit.

avi scoopneck

Our Avi Cotton Scoop Neck bralette is an everyday cotton piece reimagined with a pop of fun lace around the band. Like all of our other tween pieces, this bralette is super soft and comfortable to wear all day.


Bottoms in our Bella by Cosabella tween collection are sized from Small to Extra Large.

These bottoms are designed on the sizing around the waist and hip. Remember that the piece should fit snug but not too tight on the waistline.

sporty breeze

The Sportie Breeze Boyleg is inspired by activewear with an athletic fit, elastic accents and lightweight sweat-wicking fabric.