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