Trinity Protective Pack – Stylish new colours: Wrist guards Elbow pads Knee pads Perfect for beginners through to the most advanced! Trinity Pad Packs come in a wide range of sizes and amazing value for money. Size Guide:Measure 10 cm above the centre of kneecap your leg circumference (around leg). Size guide is for the knee pads Youth S/M 20-25cm Youth L/XL 23-30cm Adult Small – 28-36cm Adult Medium – 34-42cm Adult Large – 40-50cm Adult X-Large – 48-55cm