What diameter dock lines should I use?

[bostonhatteras]

I had 3/4” lines made with 18” eyes with New England Rope via Defender.

Not sure that they are still doing custom stuff though.

Defender has quit doing any rigging or splice work. They are a generic mail order/drop ship retailer now. Sad

[bostonhatteras]

Try Hamilton Marine, still a family owned and operated marine retailer. They just made me a new rode, produced in 4 days, of 300' Yale 3/4" 8 plait spliced to 100' 3/8" ACCO G43 chain and with me picking up it was $1350. Next closest price was 1850 and that was R&W Rigging in New Bedford MA. On top of that R&W couldn't promise domestic materials I'm sure youll find their price and service more than acceptable. https://hamiltonmarine.com/splicing/