The liner does show some wear - some areas have a "shine" to it / scuffing, but not bad. 

Small dot on the inside vent liner.  

The stitching on the lining of one armpit looks like it's been hemmed. 

The stitching on the liner of the other armpit has split in two areas - it's a clean split, on the hem, so easy enough to repair without notice.    

The chest measures 20.75" across, so I estimate this is about a size 38.