1around there; that area. Indicates a nearby location (similar to そこら).
駅はそこいらの方にありますよ。
The station is somewhere around there.
あの店はそこいらにあったはずだ。
That shop should have been around there.
2that; that matter; that point. Refers to a topic or matter being discussed.
そこいらのことは後で詳しく話そう。
Let's talk about that matter in detail later.
その提案の良し悪しは、そこいら次第だ。
Whether that proposal is good or bad depends on those points.
3about that much; approximately that amount — often used after a number as in '…かそこいら' (about ...).
家から駅まで歩いて十数分かそこいらだ。
It's about ten-odd minutes' walk from my house to the station.
彼女は二十歳かそこいらだと思う。
I think she's about twenty years old or so.