A garment attachment assembly is provided. The assembly includes a plurality of garment attachment modules each having an elongated support member, a garment attachment provided on an inner side of the support member, an accessory attachment provided on the outer side of the support member, and a coupling mechanism for coupling adjacent supports in an end-to-end configuration. Adjacent garment attachment modules can thus be coupled to adjust an overall length of the garment attachment assembly to fit a garment, and allow an accessory to be attached thereto. Corresponding method for securing an accessory to a garment is also provided.