Size 42 x 42 cm, large enough to fully enclose the feet. I opened the box to take photos to show that all the accessories inside the battery box are included, but it is unused. The mat bag has not been opened. Purchased on Amazon. Order date: December 20, 2025, arrived on the 21st. This is a highly-rated product. I am selling it because I received a similar, non-new item shortly after purchasing this one. Photos 1-4: Actual product photos Photo 5: Proof of arrival date Photos 6-13: Quoted from the website Quoted from the following website: 【Warms your feet and is a foot warmer type】This foot warmer type warms your entire feet. Also, it uses a Japanese-made graphene fiber heater instead of a heating wire, has excellent thermal conductivity, and is designed for quick heating, warming a wide area evenly in about 5 seconds! It also has a far-infrared effect from graphene heating, warming you from the inside out!! In addition, the foot warmer can be used not only for your feet, but also for your abdomen, back, shoulders, buttocks, lower back, knees, and other areas. It is a multi-functional USB electric foot warmer that can also be used as a cushion when placed on a chair. 【Convenient USB power supply & 35800mAh large capacity battery included】 【Up to 65℃ extremely warm & 3-level temperature adjustment】 【High heat retention and comfort & washable for hygiene】 I am unable to respond due to being busy, so I will not accept price negotiations.