Size 4: Length 22-22.5cm Size 5: Length 23-23.5cm Size 6: Length 24-24.5cm Size 8: Length 25-25.5cm Size 9: Length 26-26.5cm Size 10: Length 27-27.5cm Size 11: Length 28-28.5cm Surfing Booties 3MM:Comfortable stretchiest neoprene diving booties , durable and grippy single layer sole without adding extra weight. A great alternative to water socks, diving fins, or neoprene socks Diving and water sports design:with anti-slip design on sole and warm thermal materials to protect your foots from hurt by rocks or other sharp objects and keep warm while underwater Surf booties menEasy on and off save more time for the surfing,durable traction sole helps you grip the boat deck dock or shore.Feel both flexible and fitting for your feet when you're doing water sports and beach activities! Wide application:This wetsuit booties perfect for snorkeling diving walking along the beach,protect your feet from cut puncture scratch and cold water.Great gift for family friends lover ect. High quality: MIMIGO kayaking surfing booties can be fitted for men women and kids, please choose the size according to your feet length and reference to our size table image. Due to everyones foot shape is difference and measuring tolerance 1cm allowed.