Large Semicircle Layout Frames

Getting perfect edges and a exact shape is key to a successful panel, no matter how large it is. Glassola Tools has created these large-size semicircle layout frames to help you build even larger panels with an exact semicircular shape.

Each frame consists of three to four pieces - two arc segments to make the half-circle and (one to two pieces to create) the straight diameter segment. Tabs connect them tightly together, and holes allow you to nail or tack them to your workboard (fasteners not included). Frames are precision-cut from high-density fiberboard, giving them excellent strength and water resistance.

Available sizes range from 12" to 24" - you can order sets of 12-16", 18"-24", 22"-24", or all 7 for one low price!

(Note - If you've already ordered our large circle frames, you can convert them into semicircles easily using our diameter pieces - check them out here!)

Please note that patterns are not provided with these layout frames. Our FAQ page lists a number of sources for patterns.