くらい

Particle (Basic ㊦ 212)

Approximate quantity or extent.

Equivalent: Approximately; about

東京からサンフランシスコまで飛行機で九時間くらいかかる・かかります。: It's about nine hours by plane from Tokyo to San Francisco.
A:その車はいくらぐらいでしたか。 B:百五十万円くらいでした。: A: About how much was that car? B: It was about 1,500,000 yen.
スミスさんは京都に四ヶ月くらい行っていました。: Mr. Smith was in Kyoto for about four months.
山田ぐらい英語が出来れば楽しいでしょうね。: It must be fun to be able to speak English as well as Mr. Yamada (literally: to the extent of Mr. Yamada).
私だってそれぐらいのことは分かりますよ。: Even I can understand that sort of thing (literally: things of that extent).

Formation

(i) Number-counter	くらい
	四冊くらい	About four volumes
	百人くらい	About a hundred people
(ii) Demonstrateive {pronoun/adjective}
	{これ /この} くらい	About this much/to about this extent
	{それ /その} くらい	About that much/to about that extent
	{あれ /あの} くらい	(Referring to an object that is removed from both the speaker and the hearer) about that much/to about that extent
	{どれ /どの} くらい	About how much?/to about what extent?
(iii) Interrogative pronoun	いくらくらい	About how much?

Notes

くらい may be freely replaced by ぐらい without a change in meaning.