Rework the rectangle. Consider creating a brochure that’s square or round. Printers often have pre-made dies in several sizes to round corners or cut a custom shape that can add character to your design.
Installing quarter round on round corners, here is the finished corner after installing the quarter round and chalking it.
Rounded corner binding. I've been wanting to do this for a while. Must be bias binding though, not straight.
How to get around those pesky rounded corners! (Website doesn't work, but you can figure it out from the picture.)
baseboard trim on rounded corners - Google Search
I absolutely hate a straight painted line on round corner bead. This is the only tool I've found that keeps the soft look of a bullnose corner soft between two colours. I can't wait to use it!!
Shop VIGO Frameless Showers Chrome Acrylic Floor Round 3-Piece Corner Shower Kit (Actual: 79-in x 40.5-in x 40.5-in) at Lowes.com
base moulding for curved corners | Here's what a baseboard looks like in our house. Ignore the other junk ...
brick corner fireplaces with mantle | Brick Corner Fireplace Accent Walls | Corner Fireplaces Design Ideas ...
How to wrap bookcloth around round corners