I don't much slide at all, but remember when I first started getting into it, I had trouble finding one that I liked using. Eventually I realised that I don't like metal slides, but prefer glass ones.
I use a glass slide now which is actually quite large in diameter, but because I usually use my first or middle finger for the slide, the other fingers tend to putt up against it and hold it on nicely. It also has REALLY thick sides too - I found that works better for me.
One tip with glass slides - don't drop them onto a hard floor! LOL. Found out the hard way, twice.
I am not familiar with Joe's sig slides, but I believe they are metal? Did they offer different sizes when you bought it?
I'd strongly suggest going to a music store and working you way through a collection of them to find the one that you like best - buy it and remember the dimensions for your next online order.
JBLP Gold Top #129 - redubbed "#1 in Oz"