Vintage yellow knitwear short sleeve shirt. 
The size is based on measurements because there is no tag. 

• Size Fits: Men's Small / Women's Medium
• Size on Tag: Unknown
• Brand: Unknown
  
• Shoulder to Bottom Length: 21"
• Width at Bottom: 15"
• Pit to Pit / Chest: 20"

This clothing item is second hand, retro, or vintage, which will result in some wear. There may be small defects on pre-loved items.