This is a lovely vintage Italian wool undershirt or t-shirt by labeled 'Maglieria Zegna, Ermenegildo Zegna, Pura Lana Irrestringible". That translates to-- "Zegna Knitwear, Ermenegildo Zegna, Pure Unshrinkable Wool" A luxury brand, this is a cream wool undershirt and meant to fit close to the body, it has a crew neck and short sleeves. Meant for a man but it's certainly unisex and would be great for man or woman this winter!
 
In terrific condition with no noted flaws EXCEPT FOR some fuzzing at the midriff. No moth damage or stains.
 
No size is given on the label- it's quite small and should fit an XS man or woman. Please read the actual garment measurements given next--
Pit to pit- 14" (unstretched) up to 17" when gently stretched. Measured across between the underarm seams
Center front length- 22 1/2" neck to hem (including the neckband) Sleeve length- 8 1/2"