Seaside Collar

small 280 mm - 390 mm ( 11 in - 15 in ) medium 340 mm - 520 mm ( 13 .3 in - 20 in ) large 380 mm - 570 mm ( 14.9 in - 22 in ) small 28 cm -39 cm medium 34 cm - 52 cm large 38 cm - 57 cm