Things You'll Need
Blue T-shirt with short sleeves
1/2 yard blue cotton fabric
1/2 yard red cotton fabric
1/4 yard white cotton fabric
1/4 yard heavyweight fusible interfacing
Yellow skirt, or 2 yards yellow cotton fabric
2 yards white braided elastic, 1/2 inch
Whether you want to create a Snow White costume for an adult or for a child, all you need are a few articles of clothing that you already have at home, some items from the fabric store and a sewing machine. The top of the dress is made with a blue T-shirt and some DIY puffed sleeves. If you don't already have a yellow skirt, it's easy to make one from a few yards of fabric.
Construct the Dress Bodice
Remove the sleeves from the blue T-shirt. Open the seam from the sleeve hem to the arm hole. Detach the sleeves from the shirt by cutting around the circumference of the arm hole. Keep one sleeve intact to use it as a pattern for the new sleeves.
Draw a vertical line down the center of the sleeve from the top of the sleeve cap to the hem. Draw parallel lines, 1 inch apart, to the right and left of this center line, for a total of seven parallel lines. Cut the sleeve apart along these lines into eight sections.
Fold the blue fabric in half lengthwise, matching selvages. Lay the strips from the sleeve on the fabric. Spread the strips apart so there is 1/2 inch of space in between each strip.
Trace a line around the strips with a pencil to create a pattern for the new puffed sleeve. Cut on the line through both layers of the blue fabric to cut out both sleeves at the same time.
Cut six tear-shaped pieces out of the red fabric. Pin three on each of the sleeves with the pointed side facing up. Applique the shapes to the sleeves using a zig-zag or satin stitch all the way around the shape.
Set your sewing machine to a long stitch length. Sew a straight line 1/8 inch from the edge of the fabric along the curved part of the sleeve cap. Sew a second line 1/8 inch from the first line. Leave thread tails of at least 3/4 inch on each end, and do not backstitch at the beginning and end.
Hold the thread tails on one side firmly in your left hand, and pull the fabric towards you with your right hand to create gathers. Repeat on the other side until the sleeve cap reaches the desired size.
Sew a casing along the hem of each sleeve. Cut two pieces of elastic to a length that fits comfortably on your upper arm. Insert elastic into the casing and thread it all the way through. Tack both ends to secure the elastic and hold it in place.
Fold each sleeve in half, right sides together, matching the raw edges of the arm seams. Pin and sew the seams from the arm pit to the hem on both sleeves.
Turn the sleeves right side out and turn the shirt inside out. Insert sleeves into the arm holes of the shirt, matching the top of the arm seams with the top of the side shirt seams and making sure right sides are together. Adjust the gathers if necessary to make the sleeves fit in the armholes. Sew the sleeves to the armholes and turn the shirt right side out.
Create the Collar
Cut your white fabric in half lengthwise. Attach a piece of fusible interfacing to the wrong side of one piece of the fabric, following the manufacturer's instructions.
Measure the length of the back of your T-shirt from shoulder to shoulder. Draw a crescent shape on the wrong side of one piece of white fabric, making the length match the measurement of your shirt neck, and the width 4.5 inches at the widest point.
Lay both pieces of white fabric right sides together. Cut on the line through both pieces of fabric.
Sew the two pieces of fabric together with a scant 1/4 inch seam allowance, leaving a 1 inch opening for turning. Turn the collar inside out, press, and slip stitch the opening closed.
Tack the collar to the back of the T-shirt. Sew a few stitches at each shoulder and in the middle to hold the collar securely in place.
Make the Skirt
Fold the yellow fabric in half lengthwise, matching selvages. Cut a 35-by-27-inch rectangle from both layers of fabric.
Sew the side seams of the skirt along the shorter sides. Sew a casing along the waist of the skirt, leaving a 1 inch section open. Cut a piece of elastic to a length that fits comfortably around the waist.
Insert elastic into the opening you left in the casing and thread it all the way through. Sew the ends of the elastic together and close the opening. Adjust the gathers on the skirt to your liking.
Decide how long you want the skirt to be. Hem the skirt to the desired length.
Measurements are for an adult-sized costume. For a child's costume, use a child-sized T-shirt, and cut 23-by-19-inch rectangles from the yellow fabric for the skirt. Follow other directions as written.
If you don't have dark hair, wear a black wig. Put a red ribbon in your hair or wear a red headband.
Wear a pair of red or yellow shoes.
Carry an apple as a clever accessory.