This item was available in the following sizes (neck adjustable): - Belly XXS-XS (30 to 34 cm / 32 to 36 cm) - Belly XS-S (37 to 40 cm / 40 to 43 cm) - Belly XS (33 to 37 cm / 36 to 39 cm) - Belly S (43 to 48 cm / 45 to 50 cm) Unfortunately this is sold out, so you can't choose a size. :(