Hole in middle of back. Marked as a large but fits like an extra small. Please see photos for details and measurements. The small squares in the photos each represent one inch and are numbered accordingly to provide measurements. This item is from a smoke-free home but I have a cute corgi so unfortunately this item is not from a pet-free home. Thanks for looking at our item! We combine shipping on multiple items, please reach out if you need any assistance :) PATTERN: Argyle/Diamond KNIT STYLE: Tight-Knit SLEEVE LENGTH: Long Sleeve NECKLINE: Crew Neck SIZE: XS COLOR: Gray MATERIAL: Wool FABRIC TYPE: Knit VINTAGE: Yes FIT: Regular BRAND: Mighty-Mac SIZE TYPE: Regular DEPARTMENT: Men TYPE: Sweater STYLE: Pullover COUNTRY/REGION OF MANUFACTURE: China