Muji top, runs small

Beautiful Muji boat neck top with 3/4 length sleeve. Size M but runs small, see measurements. Stunning, cream and black stripe, heavy weight material that feels like a cross between a knit and heavy weight cotton (see up close photo). Purchased in Japan in 2009 and in excellent condition, no stains or snags. Selling because is has become too small for me. Measurements taken flat: Bust 17” Shoulder 15” Length 22” Sleeve 18” Bicep 5.5”