Fitbit Blaze Screen Protector, Peyou [2PCS] [Tempered Glass Screen Protector] [Bubble-Free] [Crystal Clear 9H Hardness] [Scratch-Resistant] Premium Tempered Glass For Fitbit Blaze Smart Watch 2016 (Wireless Phone Accessory)

These are really good. They fit my smart watch perfectly. They are easy to apply and remove. They are also easy to clean. Do be careful thought I bumped up against my wall and I got a small scratch in one of the protectors. But at a distance you can't even notice it.
I got these deeply discounted, I was in no way compensated for my honest opinion.