Why 大 also covers your age and your voice

Where the picture shows up in 大

1. 1

   clothes spread past the body

   这件衣服太大了，有小号的吗？

   zhè jiàn yī fu tài dà le, yǒu xiǎo hào de ma?

   This one is too big. Do you have a small?

   Shoulder seams hanging well past the shoulders, the fabric drooping

2. 2

   rain thickens

   外面雨下得很大，带把伞吧。

   wài miàn yǔ xià de hěn dà, dài bǎ sǎn ba.

   It's raining hard out there. Take an umbrella.

   Fat drops hitting the pavement hard enough to bounce back up

3. 3

   years stack higher

   我姐姐比我大三岁。

   wǒ jiě jie bǐ wǒ dà sān suì.

   My older sister is three years older than me.

   Two people side by side, one marked with a longer line of years

4. 4

   a voice spreads wider

   请说大声一点，我听不清。

   qǐng shuō dà shēng yì diǎn, wǒ tīng bu qīng.

   Could you speak up? I can't hear you well.

   Sound rings widening out of a mouth until they touch the far wall

5. 5

   an operation spreads out

   这家公司很大，有三千人。

   zhè jiā gōng sī hěn dà, yǒu sān qiān rén.

   This company is big — three thousand people.

   Desks in rows running all the way to the back of the floor