Product size 3 x 8.5 * Retail pack size 4.88 x 10.25 * Small/Medium fits Women\'s sizes 5-8 and Men\'s sizes 4-7 * Bx/30 Pair * Foot Warmers are thin comfortable air-activated Warmers that fit in your shoe or boot and provide over 5 hours of soothing warmth beneath your feet * Warmers are widely used for portable long-lasting heat therapy * Perfect for sufferers of cold sore feet and toes as a result of Arthritis Raynaud\'s Lupus Scleroderma Sj