Product description:
These foam cervical collars are covered in stockinette and are secured with a touch and close fastening. They offer support to the neck and are ideal for long-term use or as a night collar. Available in four sizes, simply measure the circumference of the neck and select accordingly.

Small - 3" x 17" (76mm x 495mm).
Medium - 3 ?" x 19 ?" (89mm x 495mm).
Large - 4" x 21 ?" (102mm x 546mm).
Extra Large - 4 ?" x 23 ?" (114mm x 597mm).