I use a Gorilla Mat. I got it on their website because it had a coupon. They are expensive though.

We got our exercise room floor from rubber flooring Inc. But they also sell smaller mats.

Here is 4x6 8mm for $66 or 10mm for $85

https://www.rubberflooringinc.com/gym-mat/46-premium-mats.html

I'd like to get a large (at least 6 x 4) heavy duty exercise mat to do workouts on. It needs to be able to support plenty of jumping, push ups, cardio activity. Any recommended brand that doesn't cost an arm and leg? Thanks.