High Quality Leather. Total 5 colors and 6 sizes. XS neck .55"w X 5.91" - 8.25" S neck .59"w X 8.25" - 11.02" M neck .79"w X 11.02" - 14.17" L neck .98"w X 14.17" - 18.11"XL neck 1.18"w X 18.11" - 22.04"