This is a fluffy, triangular bed. It was too large for my button parakeet, so I couldn't use it. It's a new, unused item, but it has been opened once for size confirmation and measurement. It is the M size shown in the third image. Due to the nature of the product, there may be an error of a few millimeters to a few centimeters. * Different colors are also on sale. * Shipping will be via either Yu-Yu Mercari Delivery or Rakuraku Mercari Delivery.