Common rectangular placemat sizes shown include about 12 × 9 inches and 12 × 18 inches.
The disposable kids' placemats are listed at 18 × 12 inches and are sold in multi-packs.
Examples include a 4-piece set with 18 × 18-inch napkins and a 12-piece set with 17 × 17-inch napkins.
The cloth napkins shown are made from 100% cotton and 100% polyester.
Many placemats list spot-clean or wipe-clean care; textilene/vinyl options note washing with soap and water and towel-drying.
Cotton napkins: machine wash and dry, iron as needed, use non-chlorine bleach if required, and wash with like colors. Polyester napkins: machine washable; one listing did not include care details.
The listings include rectangular and round placemats.