Top Season Woman's Vtg USA Black Tank Top NO Size tag X Large 18/20 Tag is worn

Top Season Woman's Black Tank Top Vintage and made in the USA. I did a lot of Looking and could not find the company and the care tag behind the company name is made out of paper and the print is worn. I could get details hard to read but the Size is not showing. So I'm looking at the size chart and my "opinion only" is that this could be a X Large or 18/20 size. Measurements are Length is 21 inches Arm pit to Arm pit is 23 inches Strap is 3 inches