标准尺寸

• 木(wood; timber)RADICAL
• 示(sign; mark)PHONETIC

A wooden sign (标) is made from wood to display directions for everyone.

• 冫(ice; cold)RADICAL
• 隹(short-tailed bird)PHONETIC

Cold ice water helps measure water level accurately, thus meaning standard, permissible.

• 尸(body lying down; prone body)RADICAL
• 乚(hook; curve)ASSOCIATIVE

A ruler is imagined as a person lying straight with curved fingers marking the length.

• 寸(thumb; inch)ASSOCIATIVE

Drawing a hand with a small dot marking the pulse-measurement point represents the unit of measurement called a cun.