24-in W x 24-in L x 0.47-in T Interlocking Foam Gym Floor Tile (24-sq ft) (6-Pack) in the Gym Flooring department at Lowes.com
Survivor SportFloor Isometric Blue 48 in. W x 600 in. L x 0.3 in. T Rubber Gym/Weight Room Flooring Rolls (200 sq. ft.) 01010805109 - The Home Depot
Commercial and Residential Rubber Gym Flooring - Rubber Flooring Direct
POWERStock® Home Gym Floor Mats – Abacus Surfaces
Rubber Flooring Rolls - Rubber Flooring Direct
Costco (in Canada at least) has these sweet rubber mats that remind me of the gym. Way cheaper than Amazon since they are heavy as heck! It's flat on the other side :
Gym Flooring - Flooring - The Home Depot
Gym Flooring Canada - Home Gym Floor Mats
How Thick Should Your Home Gym Rubber Flooring be? – Word of Mouth Floors
Amazon.com: 0.56 Inch Thick Gym Flooring for Home Gym with Rubber Top - 48 Sq Ft Interlocking Gym Floor Tiles - Workout Equipment Vibration Reduction Mats - 12 Pcs 24 x 24in