- Unisex white shirt - Tab collar, long buttoned sleeves - EASY-REGULAR fit, 1 patch chest pocket - Buttons to fasten, IKKS button on left cuff Pierce is 1.85 m tall and is wearing size L Erin is 1.72 m tall and is wearing size L See our size guide Mini-me ! See the kid’s white shirt The approach IKKS ACTS BETTER pure organic cotton. Timeless. Must-have. IKKS redesigns the white shirt in a gorgeous organic cotton. It can be worn for both formal and casual occasions.