Moss Hollow and Tweeters Mineral Block is an excellent source of calcium for both birds and small animals! Your pet will have fun nibbling on these, which will help keep their teeth and beak trim at the same time. Fun vegetable and fruit designs Great source of calcium Can be used for birds and small animals Sizes (Approximate): Cabbage: 4" x 3.5" (11cm x 9cm) Corn: 3.5" x 2.5" (9cm x 6cm) Pineapple: 3" x 2" (8cm x 5cm)