Another rear sight blade conundrum

[S&W Fan]

Ok so I want to replace the rear sight blade on the 2.5” 66-2 I’ll be bringing home this weekend, want a white outline. The smith at the shop said it’s .150”, customer service at S&W says it’s .106”, I don’t have calipers so relied on the shop guy.

I see .126, .146 and .160 readily available online. Any help on what the proper height should be greatly appreciated. In my forum search I found lots of posts but not any that mentioned which is proper for the 2.5”, thanks.

[colt_saa]

Here is an old chart

[S&W Fan]

Thank you very much!! Got the new blade kit on the way and have my ziplock bag ready lol.