Vintage Vietnam war era United States military OG-109 1/4 sleeve crew neck cotton undershirt.  Signs of age and wear- some very minor/slight fading/discoloration.  No holes or rips.  Made in USA.  Stamped size XX-SMALL.  

Measures flat (approximately):  pit to pit 12.5", shoulder to shoulder 12", neck to bottom 23".

Please refer to photos to judge condition for yourself.  Be sure to ask all relevant questions prior to completing purchase.  Thanks.