This is not rocket science but you do need to do spend some time and do your research. Most rifles stocks are usually too low for optics. The reason is that you can always pick your head up a little if the stock is too low, but its much harder to go in the other direction. So most times you want to get the lowest height mounts that work for you.
So look up or measure the specs of your scope. Take the objective lens OD, subtract the tube diameter, and cut that in half. That's the amount that the bell will be lower than the bottom of the rings.
It sounds like you already have the bases. Measure the base height. Now start looking at rings. Start with the lowest and get the distance from base to the bottom of the ring. Add to the base height, now you have the distance of the scope tube above the receiver ring. Subtract the figure computed in the previous paragraph. Now you have the distance from the receiver ring height to the bottom of the bell. If it's positive then your good. If its negative then that is the amount the bell will be lower than the receiver ring.
If its negative take a straight edge and place it along the top of the receiver ring. Look at the scope dimensions and estimate where the full diameter of the bell will be closest to the receiver ring. Measure the height from the barrel to the straight edge. If it's larger than the negative value from the previous paragraph you are good - the scope bell will be lower than the receiver ring but will not reach the barrel.
DO NOT USE ANYONES CHARTS OR TABLES. They are way too conservative because they normally don't take into account all the factors and you will frequently end up with a higher mount than you need. The last thing any manufacturer wants is to have your scope not clear the barrel. If it's too high though, they really won't care.
Most ring manufacturers have the ring heights posted. Base heights are another story. They are not always available. If you don't have the bases post what you want to buy and someone will probably respond with that distance.