Size:  3mm (2.9mm*5.5mm*3.5mm) (ID/OD/H)    
       4mm (3.6mm*6.9mm*3.6mm ) (ID/OD/H)
       5.5mm (5.4mm*8mm*3.4mm) (ID/OD/H)

Packing:  
Brass Eyelets:  3mm, 1kg/bag, about 12000pcs/bag                    Iron Eyelets:    3mm, 20000pcs/bag     
                          4mm, 1kg/bag, about 8500pcs/bag                                               4mm, 10000pcs/bag    

                          5.5mm, 1kg/bag, about 6000pcs/bag                                            5.5mm, 10000pcs/bag