EUC! Super rare vintage Museum of Modern Art (MOMA) red acrylic engagement ring. As best as I can size this is about a 7.5. See photo. My wedding band is a 6 and my MOMA ring about a 7.5 (it’s a tiny bit roomy but in a comfortable way. It doesn’t slip over my knuckle). With a wider band, it feels a little tighter, hence the disparity between my thin wedding band and the MOMA ring. :)