Moretta's leg elongating heel risers are ideal for adding a little length to the leg or for wearing in stiffer new boots to avoid behind-the-knee discomfort while they wear-in. Used in singles they can also even out discrepancies in leg length. Sold in pairs. Fit guide: Small UK 2 (34) - 5 (38), Large (UK 6 (39) - 9 (43).