i used to work in the men's dept at macys. they didn't have an official suit dept at the one i worked at, BUT they do have some killer sales on suits during the summer. Especially right after summer inventory and clearance stuff goes on sale for super cheap.
i will tell you this now, unless your macys people are paid on commission, know your measurements BEFORE you start shopping. When I worked there, the people they hired didn't have a clue. (that includes me tho...

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