Wide Calf Knee High Boots With ZipperThe shaft measures approximately 3. 0" from arch Heel measures approximately 3. 0" Key size? 0. 43" platform. 3. 0" heel. 14. 73" shaft height For more size data for knee high boots. please refer to the picture. Anti slip rubber sole? The rubber sole and the pattern design are more slip resistant. The excellent traction of these wide calf boots makes walking more stable. Elastic design. perfect fit for your legs? The elastic band design on the shoe