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 drop-down.The Top chest attribute in the size chart refers to the garment 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/solid-color-cotton-kurta-set-in-black-mve10121383024Solid Color Cotton Kurta Set in Blackhttps://medias.utsavfashion.com/media/catalog/product/cache/1/small_image/295x/040ec09b1e35df139433887a97daa66f/s/o/solid-color-cotton-kurta-set-in-black-v1-mve1012.jpg54.468USDInStock/men/men/plus/men/festive/men/casual/men/cotton/men/black/men/kurta pyjama/men/buttons/men/contemporarySolid Color Cotton Kurta Set in Black <ul><li> Cotton Asymmetric Kurta in Black</li><li> This Readymade Attire is Highlighted with Buttons. Crafted in Collar Neck and Full Sleeves</li><li> Available with a Cotton Pajama in White</li><li> Do note: Footwear shown in the image is for presentation purposes only. Half to one inch may vary in measurement. (Slight variation in actual color vs. image is possible)</li></ul>USDtype_new:Kurta Pyjamacolorfam:Blackfabric:CottonBlackCottonKurta Pyjama11%-20%MenWithin 15 days, More than 15 DaysReadymadeFestive, CasualMenswearButtons, Contemporary32, 34, 36, 38, 40, 4244, 46, 48, 50, 52