Above: Pretty? Sure. But a small fry compared to what you’ll create as a master Enchanter
Depending on where you are in the game and how much time and effort you’ve put into Enchanting, you may have tons of gear stashed away that is already enchanted. If you haven’t dabbled much in Enchanting yet, chances are you’ll have to disenchant/destroy these items at an Arcane Enchanter in order to learn various enchantments anyway. Fortunately, disenchanting earns you a huge skill boost each time you do it - usually more than enchanting gear yourself.
Above: Oh, the skulls? Never mind the skulls...
The size of the soul gem (make sure they’re filled) used in the Enchanting process will affect the resulting value and strength of the item being enchanted, but will not affect how much experience you get from the process (nor will the item or enchantment, the skill increase is always the same flat rate). As such, we recommend sticking to petty or lesser soul gems as you grind for experience, as they’re cheaper to buy and easier to find. If you’re looking to make some mad profit, however, feel free to use higher level gems - especially on expensive jewelry.
We don’t recommend going out and filling empty soul gems yourself. Yes, it’s cheaper to do that, but considering the fact that you can sell your enchanted creations for a profit, buying filled petty/lesser gems is the easier route if you’re solely looking to level up. Magic and general goods merchants carry soul gems.