If the Apple watch strap does not fit, can I return or exchange it? Is it free or not?

Hello, I want to buy an Apple Watch strap (Pride Edition Braided Solo Loop). I measured the strap from both methods and I do not know exactly if I will feel good when I get it. I wanted to ask if I could exchange or return it after I got it? Because I wanted to see the strap up close and get it, but unfortunately I visited the Apple Store a few times and it was not possible due to the pandemic conditions of Corona. please guide me.

Thank you