my costume is....really confuzing me

[corpsic beauty]

ok..so the shoulder is too big for the sleave to fit into
how do i describe it....
the diameter forthe shoulder is twice as big as the sleave.
yes, i made the front peice sepreatly from the sleave
a bad idea?
i think so
so how do i fix it?
i need it baggy because the shoulders are baggy
so..
i can't cut it or anything...
advice?

[Runa]

First, confirm that you made the sleeve big enough for your arm     If not, you WILL have to cut a new sleeve no matter what, so be sure to make it big enough to fit this time.

If the sleeve does fit you, you have a few options:
(1) cut a new sleeve that is wide enough at the top to fill the arm hole, and then tapers down to the original sleeve size by the elbow area.
(2) cut a wedge of fabric - known as a gusset - to fill in the extra (this is more or less like cutting a second sleeve piece but it would taper down to nothing in about 6"
(3) put a running stitch in the armhole and gather it until you've shrunk the hole down to the same size as the top of the sleeve.