Grabber Foot Warmers - 5 Plus Hour - Pack of 10 Pair - Medium/Large Package of 10 Pair. 5+ hours of warmth. M/L Fits Shoe Size: Women: 9+, Men: 8+. 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