Thin

瘦

shòu

(having little thickness or extent from one surface to its opposite)

瘦

shòu

(having little body fat or flesh; slim; slender; lean; gaunt)

細 /细

xì

(having little thickness or extent from one surface to its opposite)

細 /细

xì

(of low viscosity or low specific gravity — see also watery, liquidy, diluted)

薄

báo

(having little thickness or extent from one surface to its opposite)