The measurement is 7 1/2 inches and as for the inscription on the other side I don’t believe there is one. The picture is taken from the other side of the tang.
I’ve had it since I was a kid… I wasn’t sure at the time of what I had and sadly kids will be kids… it’s a little beat up but hopefully this helps. As for Robs reply I will be getting talcum or baby powder to make the mei further legible.