You could try using this pattern. http://www.annespatch.pwp.blueyonder.co.uk/picture9.html It's incredibly basic and I'm not totally convinced by the shape, but you could try just making them a bit longer on the wrist and cutting the pattern straight instead of doing the fingers and chopping off the top of the thumb.
Well the measuring bits with body parts doesn't work for me, all my bits are a bit too short lmao! My arm to nose span to get the yard is 5 inches too short infact.
Metric systems are far easier to work with because they divide nicely. But I have to convert one to the other as I work in a fabric shop in the UK and most people still work in imperial in dressmaking.
There's other ways, but I know of none that would be more effective or show anyless.
It mainly depends on the stitch you use. I never sew my holes with a machine, I always do it by hand. I do a striaght stitch but I make sure it stays on the inside. I put my needle in through the back first and out through the front so my knot is not showing. I then put the two sides together so it looks like a normal seam as you are looking at it. I then take a stitch through one side right in the seam line, then another on the other side directly next to it. and so on til I reach the end, then tie off. I don't know if that helps at all or even makes sense, but any problems pm me!