Thank you for viewing! (^^) How about this for a spare bed for your pet, or a hideaway, as it tends to get dirty quickly? ✽Size✽ Overall... Approximately 23cm x Approximately 18cm Bag part... Entrance approximately 26cm x Depth approximately 16cm Rubber bands for securing a heater are attached to the back. The 4th and 5th images show an example of attaching the "Hot 2-Way Heater M". *Heater not included. Interfacing is used for the bag fabric, and quilt batting 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 imperfections and wrinkles. Please understand this before purchasing. m(_ _)m