Thank you for viewing! Please read the profile before purchasing. This is a reversible, cold-weather vest!! It's warm because it's a combination vest of warm burgundy quilted fabric and fleece lining♬.*゜ My dog wears it over her clothes when we go for walks^^ It fastens with snap buttons. Neck: 34-44cm (Those with a neck size of 40-44cm can't wear clothes underneath, it's, it's tight!) Chest: 50-60cm Approximate back length: 31cm Approximate front length: 27cm Are there any French Bulldogs that fit these sizes?❤︎ Please understand that this is handmade before purchasing.