It does also depend on the amount of venom received as well as the type of skin area you were stung.
If you scraped away the stinger quickly then not too bad. if you squeeze the stinger you pump in more venom.
I find soft tissue areas tend to swell more. Fingers and near the bone swell less, one on my nose bridge recently stung like billyo but hardly swelled. One on my scalp hardly noticed, one on my temple and my eye swelled - go figure