Making a basic top
To start with measure the distance between your shoulder and where you want the top to come down to on your body. Double this amount, add some extra for hem allowance and measure out this distance along the length of your fabric. Then measure the distance from one side of your waist to the other. Add extra for hem allowance then mark out this distance on the width of your fabric. Once this is done cut out this piece of fabric from the main piece. Keep the rest of the fabric for sleeves.
Fold the piece of fabric in half lengthways then find the middle of the width of the fabric. Next work out how large a hole you would need to be able to put your head through. From the middle of the width mark out half of that measurement on either side.
Cut along the fold at the top of the fabric to create a hole you can put your head through.
Once you have done this measure the distance between your shoulder and your wrist, or from your shoulder to where you want the sleeves to finish if you're making a short sleeved top, then add some extra for hem allowance. Mark out this measurement on the length of your leftover fabric then mark out about forty centimetres width (if you want wider, more dangly sleeves then make this measurement larger). Cut this piece out and cut another identical piece like it.

With the fabric of the main body still folded, fold a side of the width of the sleeve in half and line up this fold with the one on the main body, placing the sleeve on the main body fabric. Pin along the edge of the main body fabric and the sleeves on one side of the fold, being careful not to pin the two sides of the main body fabric together. Pin the other side of the sleeve to the other side of the main body fabric. Do the same for the second sleeve and the sew the sleeve pieces on.
Next stitch along the length of the sleeve to close it up, ensuring you stitch it with the right side out so that the hem is on the inside of the sleeve and that the excess edges are not visible on the outside. Once this is done try the top on and pin the end of the sleeves so that they are the correct length, folding the excess fabric into the inside of the sleeve. Stitch along this hem to finish the sleeves.
Try the top on again and fold the bottom of the front piece of fabric over with the excess on the inside of the top so that it is the correct length. Pin along this fold. Once you've taken the top off fold it in half again along the neck line and pin the back of the fabric so that it's the same length, the excess fabric being folded into the inside of the top again. Sew along both of these folds.

Turn the top inside out and fold it in half along the neck line again. Stitch along both sides to close the top up. Once this is done fold the edges of the neck hole over, the excess fabric going into the inside of the top once again, and stitch along them to hem them. If the neck at the front needs to be V shaped cut away a bit of the excess fabric and then fold along the lines and sew.
If the front of the top needs to be open like a shirt instead of closed like a t-shirt then before stitching the edges of the neck hole mark along the halfway point (from one of the sides to the other, not from the top to the bottom) then cut along this line ONLY on the front of the top, not on the back. Once this is done fold the fabric in on either side, the excess fabric on the inside of the top, ensuring that both sides are equal once folded. Sew along these folds. Finally stitch the hems around the neck and trim any excess thread.
Tutorial Provided By: Lil' Samuu