How can I purchase a sterile urethral sizing catheter to determine the
length of a female urethra in millimeters.  I am looking for a
disposable, sterilze catheter that can be slid into the urethral
opening, and a balloon type "stop" can be deployed in the bladder so
that the reading can be made externally with no accessories and simply
reading the preprinted length measurements on the catheter.  The range
of lengths should be 3-10 cm with 0.5 cm intervals.  I wish to
distribute these catheters around the world and require a product that
is CE-marked, currently on the market, and readily available.  I
expect to purchase several thousand, and hope to pay less than $10
per.

Curious. In any case, the female urethra is usually 3 cm or less in
length. There are catheters on the market that operate as you
describe: a balloon at the end to keep it in the bladder. It requires
a syringe to inflate and deflate the balloon. One cannot help but
wonder what you have in mind. And, although the catheters are sterile,
if not used properly urinary infection would certainly be a
significant problem

Thanks for the comment.  We intend to distribute the product to
urologists who need to determine the urethral length in a fast and
simple procedure for a clinical application.  We are really just
looking for a manufactured Foley catheter with gradation marks on the
exterior of the catheter so that when the balloon is inflated, the
urologist just tugs on it to place it at teh bladder neck and then
looks takes a reading off the Foley.  Thanks

Contact Bard, they manufacture disposable urological catheters and
other items. you could also investigate Asian medical device
manufacturing and sterilize/package the catheters here yourself or
contract with someone.