Swim with the Dolphins! We love the ocean and we love these playful Dolphin Crazy Arms®. Like all Crazy Arms, they are made from yarn regenerated from ghost fishing nets, that are removed from the ocean where they are such a danger to marine life. Dolphin Crazy Arms are great for a day splashing around at the beach or by the pool Product Details Premium Italian fabric Made from recycled yarn* Soft feel ARPANSA tested UPF 50+ (blocks over 98% over UVA and UVB rays) Light-weight (140gsm) Breathable Quick drying Two-way stretch for perfect fit 90% Recycled Polyamide (Econyl®); 10% elastane (Lycra®) Gentle elastic band at top to hold in place Side seam, incorporating woven Crazy Arms® label Made in Australia * The fabric is made from ECONYL®, a regenerated nylon coming from ghost fishing nets recovered from the ocean, and other nylon waste. Size Guide Crazy Arms® sizing is based on the height of your child. Simply measure their height and this will tell you which size to order. X-Small: Kids between 95-115cm (35 -45") Ages 3-4 Small: Kids between 115-135cm high (45-53") Ages 5-8 Medium: Kids between 135-150cm high (53-59") Ages 8-11 More details on sizing can be found here