周长

sān jiǎo xíng zhōu cháng

三角形周长

perimeter of a triangle

hú zhōu cháng gōng lǐ

湖周长12公里。

The lake is 12 kilometres in circumference.

dì qiú chì dào zhōu cháng

地球赤道周长

circumference of the earth at the equator

yān cōng zhōu cháng liù mǐ

烟囱周长六米

a funnel six metres in girth

shù zhōu cháng yī mǐ

树周长一米

tree with a girth of one metre

yuán zhōu cháng

圆周长

the perimeter of a circle

zhōng hào zuì dà shì hé yīng cùn zhōu cháng shǒu wàn pèi dài

中号，最大适合6英寸周长手腕佩戴。

Medium size is for 6 inches at max for the wrist wear.