Hi @teknon,
There are a variety of different aloe species but I think most of them do get pretty large. Does it get a lot of sun where it's planted? Is the color vibrant green or more of a pale grey color?
It's easy to overwater aloes, especially if they aren't getting enough light, overwatering could be a reason it's not getting larger, or not enough sun, or maybe both.
Do you have a picture?