Finding the right saddle...

[OakLeaf]

Got the sit-bone measurement and it looks like 16cm. I got the measurement from someone who knows anatomy very well so I'm thinking it is right.

WOuld that change the saddle selection? maybe a wider seat?

Yeah, 160 mm is pretty wide, wider than most saddles go. Remember that you need some room on either side of the center of your sitbones, for proper support - when a manufacturer says their saddle is, say, 162 mm (about as wide as anything other than Brooks go), that's measuring from outside to outside at the widest point. The points on the top that will actually be supporting you are closer together. If you're 160mm center-to-center, then seriously consider a Brooks. They're heavy, yeah, but they're wide, very T-shaped, and people who need a very wide saddle just love them.

Just as they say about aero position - if you can't breathe, then the deepest tuck with the least wind resistance isn't the fastest position for you - it's the same with saddles. You may be giving up some weight to other riders, but if other saddles don't let you push off your saddle as hard or as long as you need to, then your weight savings is useless.