"TheChief" wrote in message
...
jim k Wrote in message:
Robin Wrote in message:
On 26/08/2016 12:05, fred wrote:
I want to measure the width of a groove which is only about 3.5mm wide
and 1-3 mm deep.
Ordinary Mitutoyo calipers with pointed tips are not much good for this
application due to the shallow nature of the groove.

Any suggestions ?


If the profile of the groove is rectangular (or near enough) the
technique I was taught was to measure with, and express the result in
units of, strips torn from Players No 6 packs


:-)
+/- a cock hair?

Depends whether he's fair-haired, brown-haired, ginger or black. The
diameter of hairs varies with colour, apparently - I forget which colours
tend to have the finest and coarsest hairs. Applies to head hair, but I'm
sure it's true for *any* body hair :-)