@Ken14 said
I enjoy see breasts tied up too I want to do it with my girlfriend but I don't really know exactly how to do it I need to learn
Go on amazon and get a book on Shibari.
Jay Wiseman's book on rope bondage is also very good for beginners.
You should buy either 1/4, 5/16/ or 3/8" rope. Since you have no experience, get 15 foot lengths of each so you can see what you like best. Very thick ropes can be more difficult to make knots, so for breast bondage and binding relatively small areas, 1/4" or 5/16 may be your best starting point. You can try knotting the rope in the store to see what you like, especially since in a marine store they will be cutting it off 1000 foot long rolls.
After you decide what you like, you should get about 100 feet of the rope. I have always liked a 50 foot piece to make a simple body harness, a 15-20 foot piece will allow you to do a variety of simple to moderate breast bondage maneuvers and make three ten foot lengths with the rest adding up to 100 feet. A marine store will have the best (also most expensive) rope called LINE in a marine store. In Home Depot or Lowes it's called rope. Sometimes the sales person will ask what you are tying up to help you decide what to get. I have been asked that by men and women and I always say my husband. When they say, "no, really" I tell them I am not kidding. That's always good for a smile and a lascivious comment.
My husband and I have about 700 feet of rope in different colors and lengths and diameters from 1/4 to 1/2 inch, because I LOVE INTRICATE ROPE BONDAGE as the dominant and submissive. If you get really good at it, you should have one piece about 100 feet long to make a full, intricate full body harness. You should also buy liquid whipping to seal the ends so they don't unravel. To make them pretty you should also get waxed whipping twine to make the ends totally resistant to fraying and it adds a real professional look to the ropes.