Solid Brass Eyelets with Grommets Decorative and functional gold coloured solid brass eyelets used to prevent holes from tearing in leather. The eyelets come with the grommet backs, in a pack of 100, in 5 mm, 7.5 mm, 8.5 mm, 10 mm, 11 mm or 12.5 mm sizes. This sizing refers to the diameter of the eyelet hole - please refer to the dimensions below for further sizing details. The 5 mm eyelet (#00) has a cap of 9 mm diameter and post length of 4 mm. The 7.5 mm eyelet (#0) has a cap of 13 mm diameter and post length of 5 mm. The 8.5 mm eyelet (#1) has a cap of 15 mm diameter and post length of 5 mm. The 10 mm eyelet (#2) has a cap of 17 mm diameter and post length of 5 mm. The 11 mm eyelet (#3) has a cap of 23 mm diameter and post length of 5 mm. The 12.5 mm eyelet (#3) has a cap of 23 mm diameter and post length of 6 mm. Recommended for use with our eyelet with grommet setter tools.