From the warmies website: “Warmies® Puppy Hugs are a super cute microwavable duo. Their arms wrap around each other and attach with Velcro making them perfect for mixing and matching to other Warmies® Hugs characters. You can also attach them anywhere and bring them with you on the go. Warmies® Hugs are TWO cute not to LOVE. Quick Facts: Simply Warm in a Microwave Soothes, Warms and Comforts Chill in a Freezer for Cooling Relief Dimensions: 9”x10”x3” Weight: 1lbs