This is a good quality white shirt, probably made in the mid-20th century or thereabouts, but now sadly past its best.
Starched front panels and starched single cuffs.
This is a collarless "grandad" tunic shirt for formal wear.
Plain starched front panels.
Plain starched single cuffs for cufflinks.
Front of shirt is designed to be fastened with shirt studs.
This is a "slipover" shirt (designed to be put on over your head).
Size (from garment measurements)
Collar size: 14.5 inches (not marked in shirt)
Chest measurement (maximum): 44 inches
Shoulder to shoulder: 16 inches
Length, neck to hem at the back: 35 inches
Length of sleeve, shoulder to end of cuff: 24.5 inches
Length of sleeve, armpit to cuff: 24 inches
Length of starched bib, measured straight down from the top buttonhole, 14 inches.