how are you going to shorten the sleeves? i prefer 3/4 sleeves to long,
which are always way too long for me!
In my case, I will use my sewing machine, but for those who are sewing
challenged or machine challenged (lacking one!), I would say the fusible
tape (to be ironed on) would probably work. My machine has the overlock/hem
stitch on it that will accomplish the job in minutes.
Please keep in mind when I suggest fusible tape or webbing that I don't make
it a practice to use this as I use my machine but it is very popular and
seems to work very well for many; it is recommended.
To accomplish shortening, I would just measure however many inches you want
to take off, allowing for approximately a 1/2" hem on the sleeves. Then you
could just turn them under and iron the hem together with the tape or
webbing. You could make a slightly more accomplished hem by just barely
turning the ragged edge under first and then turning the 1/2" hem for
sealing. Depending on the type of material, this will keep the material
from ravelling and leaving all sorts of odd strings hanging from your sleeve
intermittently. Personally, I don't worry too much about the strings unless
I'm sewing something like rayon that's very shiny that the thread doesn't
hold very well.
HTH,
Jamie