Abby Franquemont posted how you can really cram up your spindles if you need to. Well I can verify that. This is 9 inched long. and about 10 inches around!
Once I skeined it out I figured about 200 yards of sport weight (10 WPI). I read of a technique where you run the singles over an hook on your ceiling and then down to your spindle. This helps to tension the singles.
Here I am showing you how I put my spindles into a shoe box with holes on each end so that the spindles can unwind the yarn.
Note here I am playing the singles together. See how the yarn goes from the spindles in the box to the ceiling hook and then down to the spindle.
This makes it amazingly easy to keep the singles from twisting on themselves and getting tangled!!!