Size: S:35cm-40cm Neck M:40cm-50cm Neck L:50cm-60cm Neck
Collar Size: 500mm*25mm*2.5mm Leash Size: 1.2m *25mm*2.5mm ( The length of size could be adjusted longer or shorter )
S:30cm-40cm Neck M:38cm-50cm Neck L:48cm-60cm Neck
Battery: 2 * R2032 button cells (included in each led leash)