Thank you for viewing! (^^) How about this for a spare bed or a hideaway that gets dirty quickly? ✽Size✽ Overall... Approximately 27cm x Approximately 20cm Bag part... Entrance approximately 28cm x Depth approximately 19cm Use it as is in the summer, and in the winter, there are rubber bands on the back to secure a heater. Images 6 and 7 show an example of attaching the "Hot Usa-Dan Reversible Heater M". ※Heater not included. Adhesive interlining is used for the bag fabric, and quilted padding is used for the bottom fabric. Please be careful if it tears or gets a hole. This is a handmade item, so there may be some slight distortions or wrinkles. Please understand this before purchasing. m(_ _)m