X-Small 7-11" 15mm wide
Small 10-13" 20mm wide
Medium Narrow 12-17" 20mm wide
Medium 12-17" 25mm wide
Large 16-21" 25mm wide
X-Large 20-26" 25mm wide
Complete the set with a macthing lead in 20 or 25mm width.
If you are unsure on sizing, measure the circumference of your dogs neck with a flexible tape or you can use a piece of string and ruler.
If there is a specific size you require that is not listed above please get in touch.