In this invention, the detachable T-shirt collar, DTSC, is for a regular T-shirt without any provision for a detachable collar. This invented collar is attached through or close to the stretchable T-shirt collar band at the neck to transform a regular T-shirt, old or new, into a more formal attire. The collar attachment is for the standard O-neck and V-neck and the stretchable T-shirt material is compatible with the collar material. The fastening method can use various methods such as a pin, paired magnets, paired male and female clip connectors and tension clips that open and close, all of which can be made from a variety of materials such as metal or plastic.

In the clothing industry, it is known to have detachable collars for shirts as far back as the 1880's. Since then there has been detachable hoodies, detachable raingear and other detachable accessories, where the attachment tabs or buttons or fasteners were integral with the shirt or the shirt already had a provision for attachment of a collar, similar to what some pastors/clergy wear. In this invention, the detachable T-shirt collar, DTSC, is for a regular T-shirt without any provision for a detachable collar. This invented collar is attached through or close to the stretchable T-shirt collar band at the neck to transform a regular T-shirt, old or new into a more formal attire. The collar attachment is for the standard O-neck and V-neck and the stretchable T-shirt material is compatible with the collar material. The fastening method can use various methods such as paired magnets, paired male and female clip connectors and tension clips that open and close, all of which can be made from a variety of materials such as metal or plastic.