Size comparison

Master wishes at some point in time to cath me during a play session. We just started sounding and after measuring the largest we were able to use last night I was wondering what the size comparison to a cath would be? Does a 9mm sound equal what in a fr cath? Just looking for a starting point for us.

Thank you for your help!

9mm Sounds about 14fr sizeish. Try that, most can easily accomodate a 14 easily anyway.

9 mm = 27 Fr - a whole lot larger than 14 Fr which is 4.5 mm

See http://en.wikipedia.org/wiki/French_catheter_scale

Great. That chart is exactly what I was looking for and couldn't find. Thank you both for your wonderful help!

Thanks for that BigK fella, handy for me that.

If inexperienced, I would stick with a 14 possibly a 16 Fr. When able to comfortably accommodate that size you might wish to progress to larger sizes.

Good advice, thank you Wolverine