Grabber Foot Warmers - 5 Plus Hour - Pack of 10 Pair - Small/Medium Package of 10 Pair. 5+ hours of warmth. S/M Fits Shoe Size: Women: 5 to 8, Men: 4 to 7. Avg. Temp: 95 degree F, Max Temp: 102 degree F Provides penetrating warmth for cold or aching feet Size: 3.5 inches x 10" inches