Listing is for 1 short sleeve blue shop mechanic's shirt manufactured by Lion.  Red patch above the left pocket says Atlantic.   The material label is gone but it is a thick sturdy material and definitely is made with a lot of cotton but could have a polyester blend.  This is a vintage piece from the 1950's.  Notice the dry cleaning wrap picture.  The last picture is of a page from a receipt pad found in one of the shirts pockets.  Notice the old "XF7" phone number.  They stopped using letters in phone numbers in the 1950's.  The size label is gone.  It measures 18 inches across the shoulders, 23 inches across the waist, and 29 inches long.  Arm pit to arm pit measures 23 inches indicating a size Large.  It is in good vintage condition.  It has no holes or worn spots.  It does have some stains.  Please see pictures.