Leatherwork

I made some holsters yesterday. Not great but not terrible either.  They do the job. 

It was surprisingly easy.  I have a remaining strip of 1mm(ish) stiff veg tanned brown leather.  About 4-5ft long, and between 13 inches and 5 inches wide.  What do I do with it?

And why do I still find myself thinking in feet and inches considering all I was ever taught at school and what I prefer to use when making anything is metric?

Also received an email telling me:
"You have been unsubscribed from the Scholars mailing list"
Made me quite sad.