Sewing the Hair. 1  1. Thread your needle. Cut a piece of extension thread about 48 inches (121.9 cm) long and thread one end through the eye of a curved needle. 2  2. Secure the weft together. A single hair extension is also known as a weft. 3  3. Make the first stitch.
Climate & Weather Averages in Belfast, Northern Ireland, United Kingdom.
Belfast (mouth of the river bank) â the capital and largest city of Northern Ireland. It is also the second largest city on the island of Ireland (after Dublin, the capital of the Republic of Ireland), and the fifteenth largest in the United Kingdom.