#12 (1-1/2" ID )Grommets are made from heavy-duty brass. They feature a 1 1/2" hole size after setting. W recommend curtain grommet hand tools or curtain grommet machine and cutters needed for curtain grommet installation on fabric. They are available in a variety of finishes and designs to fit all your needs.Special design and decorative best quality satin plated curtain grommets & washers are 100 pcs set per bag.