Grand Damper Felt question

[Phil Bondi]

Hi all.

Recently installed new damper felt on an older no-name (literally) very 
baby grand. I used Schaff's 956 -957-958 (p.94).

The 956 (single string) was just a smidgen too wide. In keeping with the 
red backing, can any of you recommend the next smaller size option 
without me sampling all available options?

It's summertime - funding is limited!

Thanks,

-Phil Bondi(Fl)