Size Measurements Fit
X-Small Length: 16.25" Width: 3.75" before folding Fits neck up to 8"
Small Length: 20.5" Width: 5.5" before folding Fits neck up to 13"
Medium Length: 27.5" Width: 8.75" before folding Fits neck up to 19"
Large Length: 33.25" Width: 10.25" before folding  Fits neck up to 25"