You can always submit your measurement after placing the order. For now, just select Customize with Made to Measure, click Add to Shopping Bag and complete order. Later on go to Account section, visit My Orders page and submit your latest measurement.
If your bare chest size measurement is 40 inches, you should select size 40 only from the product page. The "Top Chest" attribute in the size chart refers to the garment's chest size. It is inclusive of the required 3 to 4 inches loosening, to ensure the right fit.
If your bare chest measurement falls between 2 sizes i.e 37 inches, you should select size 38.
https://www.utsavfashion.com/product/satin-blazer-suit-in-black-mcd49362151Satin Blazer Suit in Blackhttps://medias.utsavfashion.com/media/catalog/product/cache/1/small_image/295x/040ec09b1e35df139433887a97daa66f/m/c/mcd49.jpg00USDOutOfStock/men/men/party/men/satin/men/black/men/coats & blazers/men/contemporarySatin Blazer Suit in Black <ul><li> Carry your charm through the wedding throng wearing this gliter waist coat and black satin shirt and suit with stripe pattern</li><li> The four piece suit has two flap pockets along with a side pocket and it also has lovely buttons</li><li> Please expect half to one inch variation in measurement</li></ul>USDtype_new:Coats & Blazerscolorfam:Blackfabric:SatinBlackSatinCoats & BlazersMenMore than 15 DaysReadymadePartyMenswearContemporary30