Several = few >= couple >= 2
Ten, a hundred, a thousand?
I may have several points to make, but I feel obliged to tell you specifically if I have 10 or a dozen or more to make so you can find a chair. ^_^
For >= 10, we have dozen, baker's dozen, score, and 20. This completes the set of conversational units of vague quantities.
If someone says a dozen, I would expect exactly 12 (especially if it’s something with very strong collocation like “eggs”). If someone says “a baker’s dozen” I would expect exactly 13. If someone says “score”, I’d be surprised, but given how infrequently it’s used, I’d expect the speaker to be using it accurately, not sloppily.