JOGAL Men's 70s Costume Rainbow Sequins Disco Party Dress Short Sleeve Button Down Shirts

I have A 14 year-old son tall and slim is a medium to big

I would like to purchase this for a friend. But any idea if the seller sells matching shoes?

Sizing: help! i am 5'9", 160 lbs, i am reading mixed reviews on sizing. what do you recommend, a medium or a large? thanks in advance!

Is the material stretchy?