Where can I get Apple brand Apple watch display protector

Hi,

I purchased some of the soft display protectors for my Apple Watch and they didn't work like the original protector that I peeled off. They were crappy off brand and too big and didn't seal or stick properly. The are super junky and a waste of my $12.00.

Can you tell me where to purchase Apple brand screen protectors for my watch? I just want the clear soft apply type of protectors. I don't want a colored hard screen protector, if I could get a clear hard protector, that could work. I am not sure if my watch is a 40mm or 44mm?

Thank you.