Brass Sam Browne Leather Studs The Solid Brass Sam Browne Leather Studs are screwed studs for embellishing leather, flap fastening and belts. These button studs are available in solid brass or nickel plated. Various sizes are available as listed below. They can be purchased as a single sample or a set of 10 by selecting the option. Please get in touch for larger quantities, and see the descriptions below for full details of stud sizing. Stud Sizing & Punch Recommendations: The Small Sam Browne Studs measure 7 mm wide at base, 4 mm diameter head, 8 mm total length, 4 mm long post. Screw length 6.5 mm, screw diameter 2 mm. Recommended for use with 3 mm Button Hole Punch. The Medium Sam Browne Studs measure 9 mm wide at base, 6 mm diameter head, 9 mm total length, 4 mm long post. Screw length 7 mm, screw diameter 2 mm. Recommended for use with 5 mm Button Hole Punch. The Medium (Long) Sam Browne Studs measure 9 mm wide at base, 7 mm diameter head, 12 mm total length. Screw length 7 mm, screw diameter 2 mm. Recommended for use with 6 mm Button Hole Punch. The Large Sam Browne Studs measure 9 mm wide at base, 8 mm diameter head, 10 mm total length, 4 mm long post. Screw length 8 mm, screw diameter 2 mm. Recommended for use with 7 mm Button Hole Punch. The Extra Large Sam Browne Studs measure 12 mm wide at base, 12 mm wide head, 12 mm total length, 6.5 mm long post. Screw length 10 mm, screw diameter 3 mm. Recommended for use with 11 mm Button Hole Punch. Check out our Sam Browne Leather Hole Punch for the perfect companion tool.