Mats - This is from a finished rod that had been varnished, so the
measurements will be about .006-.008 oversize. Also, you should be aware
that
there are often more than one versions of a Young rod. If anyone has
something more definitive, I hope they will post it. The rod I measured
was 7
1/2 feet,  3 piece, for a 5 weight line. Each section was 30 1/2 inches
long.

Tip
0 -.082
5-.085
10-.105
15-.118
20-.120
25-.150
29-.163

mid
33-.175
35-.182
40-.192
45-.210
50-.218
55-.235
58 1/4- .238

Butt
62 1/2-.254
65-.258
70-.275
75-.285
80-.325