admin-yOfbU, 30/09/201630/09/2016, Our Rings, birds, colour rings, flags, marks, rings, tags, 0 Our rings, bands and other marks are made from the best for colour marks for birds multi-layered impact acrylic (PMMA) material. We offer a variety of colour combinations and sizes. Rings are perfectly rolled in the shape you need. Our special offer are the rings for small passerines and waders like: Tits, Finches, Sandpipers, etc. Minimum leg ring size is 2.5 mm inside diameter and 4.0 mm width. All parameters of final product per your specification and coding for engrave are detailed agreed with the order.