I've recently been watching a video where a guy is re-establishing the edge of an approximate 8" knife blade length on an 8" x 3" synthetic water hone. This has me wondering if hones for razors might be scaled accordingly. So I grab a nearby 5/8 full-hollow ebay straight razor junker. Blade length there is around 3". This leads me to conclude that if an 8" x 3" honing surface suffices for an 8" knife, then perhaps a 4" x 1-1/2" honing surface would be more than enough for the razor, which is essentially a folding pocket knife in this regard. Does this seem reasonable?