This is a variation on standard hammocks. It is large and so it suitable for larger pets such as ferrets and chinchillas in addition to being perfect for rats! The center of the hammock has a section of fleece attached to it - perfect for those cosy nights snuggled up with a friend! All our toys are machine washable at 30 degrees in a washing machine. This measures 50cm (20") corner to corner - the main body of the hammock is approx 30cm (12") and the fleece section is 20cm (8") wide. This will fit up to 4 adult rats at a time.