#4 Works well for ropes in the 3/8 to 3/4 range. This is a product called whipping twine and it is used to wrap the ends of rope to keep them from
Rope Whipping Twine & Lashing
The Splice Rack, Sorry if I'm the annoying new guy but help me out
Marlow Whipping Twine #4
Whipping Twine, Waxed Medium #4 0.8mm Red Spool/41m - Budget Marine
Marlow No. 4 Waxed Whipping Twine
#4 KILO KOP 2220 METRE
WAXED WHIPPING TWINE,BLUE
Shop BAINBRIDGE No. 4 Waxed Whipping Twine, Green at West Marine. Visit for prices, reviews, deals and more!
No. 4 Waxed Whipping Twine, Green
Light Duty Needles — Knot & Rope Supply
The DIY Sail Repair Kit - Practical Sailor
Novabraid Polyspec 1/4 White with coloured tracers. The Chandlery
E) Student Practice for Whipping rope and Tools