DOG ROPE – Mammoth Flossy Chews Cottonblend Color 3-Knot Rope Tug [X-Large] $4.49

https://www.amazon.com/Flossy-Cot…B001GIIZQQ
Cheapest it has ever been according to CCC. I use these for a full grown GSD that uses them daily and they last quite a while (6-8 months). Best rope that I have found.
Large is also only $3 but is an add on item (can get around it using Alexa)