Urhomey plus Narrow Expandable Shelves, 2 Pack, 5.1" Deep and 16 to 26" Long, Satin Black

Depth of 5.1 inches is the whole point of this pair: narrow enough for a slim cupboard or a desk edge where a standard riser would overhang. Length pulls out from 16 to 26 inches, overall height is 7.3 inches, and about 6.14 inches stays clear underneath.

Each shelf is quoted between 20 and 26 pounds, so think crockery and jars rather than appliances. Metal panels carry a satin finish. Four screws hold the frame, with a brace running under the deck and no fixing needed at the midpoint. Both units flatten away for storage, but neither will contract below 16 inches.

Either rack works alone or one sits above the other. The maker also cites a design patent number, which tells you nothing about how the shelf performs and is omitted here.

• Two narrow shelves per pack
• Length adjusts 16" to 26"
• Depth 5.1", height 7.3"
• Clearance underneath about 6.14"
• 20 to 26 lb per shelf
• Satin-finished metal, black; four-screw build