Do you do customised lengths? I'm looking for some clip ins of about 26" long

We can, but we would have to have them created when we do our large batches - and production does take about 3 months. What you might like better is that our individual single dreads are close to this length and ready to ship now. You could take them and sew them onto a ribbon and then sew clips to this and it would completely customize your set with no wait time.