Though a specialty fixture, this round-cornered island is presented almost as a baseline for comparison. As an island, all corners were rounded in this fashion.

For all round-corner shelf edges see…
Round-Cornered C-Channel
Round-Cornered Gondola Shelf Cap
Round-Cornered Aluminum C-Channel
Round Cornered Island C-Channel

For more than you wanted to know on C-Channel try…
Inseam Size as Visual Footnote
Rollerblade Skate Hook
Reverse Hooking A Spiral Rack
C-Channel Forms Shelf-Edge Tray
Curve Creates Store-in-Store Destination
Curved C-Channel and Label Strip
Shelf Overlay Includes C-Channel
Back Labeling a Multi-Hook with C-Channel
Empty Box Sells Full Box
Super-Duty C-Channel Mount
Strip Merchandiser Offers C-Channel
Round-Cornered C-Channel
Round-Cornered Gondola Shelf Cap
Round-Cornered Aluminum C-Channel
Round Cornered Island C-Channel
Slatwall Tray for Photo Albums.”
Shelf-Edge Signs of Gold
Curved Channel Hosts Scan Hooks
Adjustable Shelf-Edge Tray for C-Channel
3-Way Sign Clip Creativity
Shelf-Edge Micro Flag
Shelf Edge Redundancy in Retail

For wood C-channel browse…
Classic Bakery Shelf-Edge Label Holders
Traditional Bread Rack
Supermarket or Local Bakery
Despoiling Wood Fixtures

For all the inside info on outside shelf-edges see…
Shelf Edge Profile Specs by Manufacturer