Check the listing for details. AlphaClips Mega Marking Clips from Sewing by Sarah. Condition: New. Listed at 24.95 USD. Each white clip carries a large square tile, one letter or number printed in bold black inside a stitched-style border, sized to read across a work table at a glance. Every stack or cut piece can be matched to the piece the pattern calls for, even when a project spans several sessions.