Red formal dress

I bought this dress online but it arrived later than when I needed it and it was a little too small for me. The bust measures at 35in. and the waist is 29in. but in the back you tie up the ribbon yourself and the fabric is open so there is room for tightening adjustments that's why I listed as medium/large even though the tag says XL the website ran sizes too small. Measures 50in. from the armpit to the bottom of the dress . 100% polyester. Boob padding! Brand new with tags still on!