Why do you want to avoid hemming? The pinking shears will create a mess weeks
down the road that you will regret. If you don't have a sewing machine, take
your jeans to either a seamstress that will do a superb job or to a dry cleaners
that offers alterations. You won't be sorry.
Sure. If you're just going to pink a raw edge, it's going
to look a little different from the usual treatment, though.
If you're just trying to shorten the legs and they're already
hemmed, you might consider a "Eurohem":
If you don't have a sewing machine, you can stitch that
seam with a hand needle, using a backstitch:
That works, too, but Fray Check brand often goes on so thickly that it discolors
the edge of the fabric, makes the cut edge stiff, and I find it tends to chafe
my skin. If you're going to use something like Fray Check, I prefer the brand
Fray Block, which comes in a "toothpaste tube" with a long snout that makes
it easy to apply just a small amount. It also dries much softer.