This is a personal reference like many other things. I also shifted from an elliptical a few years ago.. Correctly you should be using the largest diameter that feels comfortable to you, to create the least amount of strain and wear on your hands . I wear medium gloves and use a 1.062 . Others I ski with use larger diameters (1.12 and even 1.18). If you ski with others ask to try their handles if you don't have a shop near to go grab some. Lot's of manufacturers options too as you've already read here in BOS . Personally I've been happy with Radar and HO handles and have not seen the need for more expensive options, although they don't offer as many diameter variations. Again , personal preference. As to 12 vs 13 , another personal choice. The 13 gives more room in the event of a mis-grab which happens to everyone. A 12 has been noted as assisting on keeping hands closer together which helps with arms positioning, so pro's there too. Onward........