Tenor Guitar String-Tuning & -Gauges Chart
Type of string will vary from maker to maker. Bronze, Steel, and Nickel will vary.
Most of the plain strings work about the same. But wound ones vary. 
Gauges will very with scale and type of strings. 
The trick is to get a nice even tension across the bridge without to much pull on the neck.
Standard Tuning C G D A 23" Scale
According to Steve Pyott @ tenorguitar.com 036 024 016 010
La Bella 700T 027 020 013 009 x-Light
D'Addario J-66 032 022 014 010 Light
GHS CU-BBTG 032 024 013 010 Light
033 025 015 011 Medium 
Eddie Freeman Special guitar (EFS) C G D A
25.5" Scale
David Hodson
032 020 028 018 (all wound)
Octave Mandolin Tuning G D A E 23" Scale
040 025 015 011 x-Light
042 027 017 012 Light
045 029 019 013 Medium
Guitar Tuning D G B E 23" Scale
026 020 015 011 x-Light
029 022 017 013 Light
032 025 018 014 Medium
Plectrum Tuning C G B D 26" Scale
x-Light
030 020 014 011 Light
032 022 014 012 Medium
042 027 018 016 Heavy
Guitar Tuning, up fourth G C E A 23" Scale
Uke Tuning, G=Minus 1 Octave 010 017 012 009 x-Light
012 019 014 010 Light
012.5 020 015 011 Medium
Slide Tuning C G C G 23" Scale
027 020 012 009 x-Light
032 027 015 010 Light
036 025 0017 012 Medium
Slide Tuning D A D A 23" Scale
028 020 013 009 x-Light
030 022 014 010 Light
032 024 015 011 Medium
Open G Tuning D G B D 23" Scale
020 013 010 009 x-Light
025 017 012 010 Light
029 020 015 012 Medium
Thanks to Mike Soares. Most of this knowledge is his generous contribution.

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