Vintage 70s Toby George Purple Textured Mod Sheath Dress

Vintage 70s Toby George Purple Textured Sheath Dress -No marked size, I estimate this as a XL. However, please review the measurements. I guessed this based on other size charts. -Measurements are approximate, taken flat, and for reference: underarm to underarm 20.5 in, waist 18.5 in, and length 41.5 in. -Good pre-loved condition, I did not find any flaws.