Collins Chinese Dictionary Plus (3rd edition), 2011:
大小 dàxiǎo
I 名
1
(=尺寸) size
2
(=辈分) seniority
- 这(這)女孩子说(說)话(話)真没(沒)大小! Zhè nǚháizi shuōhuà zhēn méi dàxiǎo! The way this girl talks is so disrespectful!
- 全校不分大小,公平竞(競)争(爭)。 Quánxiào bù fēn dàxiǎo,gōngpíng jìngzhēng. There are no distinctions of seniority at all on this campus - everyone competes on an equal footing.
3 (=人口) people (pl )
- 全家大小共三口人。 Quánjiā dàxiǎo gòng sān kǒu rén. There are three people in my family altogether.
4
(=大的和小的) total
- 我市大小超市有上百家。 Wǒ shì dàxiǎo chāoshì yǒu shàng bǎi jiā. Our city has a total of over one hundred supermarkets.
II 副
anyway
- 他大小是个(個)经(經)理,说(說)话(話)算数(數)。 Tā dàxiǎo shì gè jīnglǐ,shuōhuà suànshù. Anyway, he's a manager so it's his word that counts.