Medela has a "nipple guage" (not sure what it is actually called) with holes to match the various size shields they make. On occasion when I have wondered if I was judging a nipple size correctly, I have used it and found it quite helpful. Not only are the sizes correlated with thier flange sizes, but I think they are also given in mm's (mine is at work or I would check it for sure). so it could be useful for other brands if you know the mmm size of the opening. Of course, especially when a mon's nipples are close to two sizes, comfort should be the primary determinant, but a gizmo such as this can give you a starting point. Note: the only connection I have with Medela is that we rent their pumps at our hospital and use some of their feeding aids from time to time. Winnie *********************************************** To temporarily stop your subscription: set lactnet nomail To start it again: set lactnet mail (or digest) To unsubscribe: unsubscribe lactnet All commands go to [log in to unmask] The LACTNET mailing list is powered by L-Soft's renowned LISTSERV(R) list management software together with L-Soft's LSMTP(TM) mailer for lightning fast mail delivery. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html