'90 Accord heather and radiator hose questions

Hi all, I have a '90 Accord LX. A couple weeks ago, one of the heater hoses went finally after 15 years, and I had to get that replaced at a local shop. A friend of mine said the other two should be replaced, and that he could do it. Does anyone know what width and length heater hoses I need and what width and length of radiator hose do I need? He told me I should replace the radiator hoses too after 15 years and I couldn't argue with that.

Thanks, Josh