Girls Activewear Starter Set – Bella Leggings + Ivy Long Sleeve
Coverage & Comfort for Active Tween Girls
Designed to feel right now. Not to rush what comes next
Free Shipping over $89
30-Day Free Returns
Free shipping on orders over $89. Otherwise, $10 for standard shipping and $15 for express (Australia only).
Orders are dispatched within 1–2 business days, with delivery in 3–7 business days depending on your location and shipping method.
30 days to return or exchange, no questions asked. If the fit isn't right - and with growing bodies, it often takes a try - we'll help you sort it.
Items must be unworn with tags attached.
You’re choosing something considered, not just something new.
Athletik Tween Promise
Designed specifically for girls aged 8–14, Athletik Tween focuses on comfort, coverage and confidence during the in-between years, clothing that supports movement and independence without asking her to grow up too fast.
| Size | 8Y | 9Y | 10Y | 11–12Y | 13–14Y |
| Height | 131cm | 141cm | 148cm | 156cm | 164cm |
| Chest | 68cm | 70cm | 72cm | 76cm | 80cm |
| Waist | 58cm | 60cm | 62cm | 64cm | 68cm |
| Hip | 72cm | 74cm | 76cm | 81cm | 86cm |
Measure the body (not the garment).
If between sizes, we recommend sizing up for comfort.
How do I choose the right size?
We've aligned our sizing with Australian standards, but every girl grows differently, especially in the in-between years. We recommend choosing based on how she likes to feel: snug and supported or a little more relaxed.
What if I'm unsure about sizing?
You're not alone — most mums are navigating this stage too. If you're between sizes or unsure, we suggest sizing up for a longer-lasting fit and extra comfort.
Will it fit as she grows?
Our pieces are designed with flexibility, stretch, and movement in mind, so they adapt to her body and keep her comfortable as she grows and moves.
What if the size isn't right?
We've got you. We offer a 30-day return policy, so if something doesn't feel quite right, you can exchange or return it with ease.
Is it really risk-free?
Yes — completely. No stress, no pressure. Just finding the fit that helps her feel confident, comfortable, and completely herself.
What's included
- Bella Legging - our bestselling full-length legging, fully opaque, never see-through
- Ivy Long Sleeve Top - soft, covered, and easy to layer over or under
Two pieces, one size and colour choice, and nothing else to decide. If you are buying Athletik Tween for the first time, this is the place to start.
Why start here
- Save $14.95 against buying the two pieces separately
- Qualifies for free shipping Australia-wide
- Coverage first - no sheer fabric, no adult styling
- Designed for tween proportions, not scaled-down adult sizing
- Both pieces work together or apart, for sport, school and everyday
- A considered gift for birthdays, back-to-school and the start of sport season
Fabric and performance
Made from recycled polyester and elastane, with four-way stretch, moisture-wicking and shape retention wash after wash. Lightweight, non-itchy and breathable - for sport, dance, school PE and everyday wear.