The interior measurements provided are accurate, but bear in mind that with a "padded" case you won't know whether the padding was compressed a little when taking the measurements, or not. Pictured is my parlor guitar in the case.My guitar's dimensions are:Body length = 18.25"Upper bout = 9.25"Waist = 7.50"Lower bout = 12.50"Upper depth = 3.625"Lower depth = 4.00"My guitar fits pretty well. There is a little play in each direction, but I normally keep a couple of hand towels in my case to wipe the neck down before putting it to bed. Not many quality cases out there for parlor guitars, this one is very good quality. I've commissioned a second parlor guitar, so I'll be buying another one. $0.02.