Finding the correct size of bracelet for the Omega Seamaster 300m diver

This will be my first really nice watch!

I bought a SMP 300m on bracelet last week from an Omega Boutique. I went in there thinking I knew my wrist size. I was wrong. Ultimately when I was there we went through 3 different sizing options until I settled on the right fit for me. Between each fitting, the watch had to get taken downstairs to the watch marker to take out links. They then explained what a hassle it is to adjust the adjust the bracelet.
Moral of the story-there’s a decent chance you may not like the size you chose. And adjusting it is a a pain - so if you can, get into a Boutique and let them do it.

PS. I had the same preferred colour dilemma - black vs green. I chose green in the end and glad I did.

When I purchased my SMP 300m and my Planet Ocean my AD sized the bracelet at the time of delivery and encouraged me A. not to lose the links and B. to return any time for bracelet change or to resize, all complementary. I can do many things, but a watchmaker I am not.

My experience is similar to @Mac_to_ten and @DavidSarnoff

I bought mine at an AD and they sized it there. It took about four sizing attempts to get to where I liked it. The AD encouraged me to come back and let them resize it if necessary. He did mention it was fiddly but he seemed adept at doing it and there were no stray marks left over. I wish Omega had went with a long single-ended screw.

I went with the green Seamaster, too.

Bracelet fit is too personal to simply measure your wrist and ask that someone size it remotely. Some people like them loose. Some people like them tight. Or somewhere in between. You need to be able to see how it feels on your wrist and adjust up or down (if at all).