Amazon.com: Economy& Easy to Use Plastic Collar Stays, Collar Stiffeners X 25 Pairs In a Pack - 64mm, White : Clothing, Shoes & Jewelry
Stainless Steel Collar Stiffeners
Amazon.com: Carbon Fiber Collar Stays Set - Collar Stiffeners - Mens - 2 Pairs - 2.5" and 2.75" with Case - Black - Non Metal Collar Stay : Clothing, Shoes & Jewelry