One pair of jeans that fit you well before you were pregnant
One t-shirt that fit you very snugly before you were pregnant (maybe even a size too small)
Scissors, seam ripper, pins
Sewing machine, coordinating-colored thread
Piece of soft elastic long enough to go around your hips or above your belly
Step 1: Start with jeans and a t-shirt.
Step 2: Cut the top off of the t-shirt just below the armholes.
Step 3: Unsew the bottom of the back belt loops using the seam ripper.
Step 4: Cut a curve across the front of the jeans.
Be conservative here. You can always cut more off if you need to. Try to cut across areas that have less fabric/decoration (e.g. above the coin pocket, but below the waistband/belt loops).
Pin the fly closed and the pockets in place.
Step 5: Cut straight across the back of the jeans.
Step 6: Machine baste across the front curve.
Step 7: Put the jeans on to check the fit.
Step 8: Prepare to sew the t-shirt.
If you plan to pull the shirt up over your belly, then pin the right side (outside) of the shirt to the right side (outside) of the jeans. If you plan to wear these under your belly, then pin the wrong side (inside) of the shirt to the right side (outside) of the jeans.
Step 9: Sew the t-shirt to the jeans.
Step 10: Elasticize the casing.
Step 11: All done!
Be creative! You can use this technique with slacks and skirts as well.
Visit my blog to see what other fun craftiness I'm up to: