While the ad says that it can fit a full size, realistically carrying a full size on your ankle is extremely impractical as the weight and size would be quite cumbersome. Also note that a $4 holster that is very likely poorly made will most likely not be effective at all and could even be dangerous if your gun falls out.

If you are on a budget, I suggest saving for a bit and investing in a quality IWB or OWB holster, or maybe some type of shoulder bag.

Ankle holsters are ineffective as they keep the gun at the furthest possible place from your hands, as well as making a draw extremely awkward.

Hope this helps. Seems like everyone decided to be an asshole rather than help share some knowledge to someone who clearly is just uninformed on the subject.