Finding your perfect fit matters.

Below you’ll find the Whistles size guide to help you choose confidently.

Whistles is a non-maternity brand, but many of their pieces are naturally bump-friendly thanks to their silhouettes and lightweight fabrics. Most styles fit true to size and can comfortably accommodate early to mid-pregnancy.

If you’re in your third trimester, prefer a roomier fit, or are between sizes, we recommend sizing up for extra comfort.

If you're between sizes or need help, just drop us a message, we’re always happy to advise.