Parson's Brand #53 Double Ply Interlined Acetate collars are designed to be worn with all neckband shirts and the #160 plain neckband shirtfront. Available in #2 Height (1¼") and in #3 Height (1½"). Neck Sizes 14-20. Sold only in boxed sets of 6. Buttons sold separately. Order size 1/2" larger than shirt collar size and use 1 short and 1 long shank collar button!