I'm trying to remember the brand of grip I bought. They were just the standard dirt bike grips at the local bike shop. I listened to advice from ADVrider and bought 2 sets, and used the throttle side grip from each set. After carefully cutting off the old ones I fitted the new ones by just stretching and working them on.
They moved around a bit on the bars, especially when the grip heater was on full and they were wet.
When they wore out, I took the non throttle side grips (the smaller holes) put them in a bucket of hot water, pulled them out and fitted them straight on. They were tight, but not overly so compared to other grips I've fitted.
They are snug and tight wet or dry, hot or cold.
TAG grips. The dual compound MX ones. They've changed the design slightly.