What size cooling mat should I get for a large dog?

Reviewers recommend a mat large enough for your dog to fully stretch out on. For big breeds like Labs, German Shepherds, and Newfoundlands, the extra-large Bedsure and Green Pet Shop pads come up most often in verified-purchase reviews and the r/Newfoundlander thread. Note that gel extra-large pads can weigh eight pounds or more, per rover.com, so fabric ice-silk mats are easier to move and pack.