Will my suit size change after gynecomastia surgery? (Photo)

It is very unlikely that your jacket size will change after excision gynecomastia, even with the addition of liposuction.  Based on these photographs it appears that your jacket size is being determined by your shoulder width, and the muscularity of your shoulders, arms, back, and chest.

Made to measure suits, yes. Off the rack, no. The 46R represents shoulder width and arm/body length. If you have had your suits tailored to fit your chest that may need to be taken in a bit. 

 From the photographs I don't think there will be enough change in the circumference of the chest after gynecomastia treatment to make a change in  shirt size or suit size.

You size will not change,but it should look better on you. From the photo you do have gynecomastia ,and surgery by the right expert should correct it if you are bothered by it.

It's unlikely your suit size will change, particularly because you are broad shouldered. However, you should obtain a very nice result from your surgery based on your photos!

I doubt that your suit size will change to any great extent with gynecomastia surgery.  Best of luck if you decide to move forward.

I really doubt it. Your suit might fit a little better, but I doubt that the overall size will change. It appears as if a lot of your chest is muscular and a small amount is the gynecomastia.