To measure someone's waist size, locate the natural waistline, which is usually the narrowest part of the torso, typically above the belly button and below the ribcage. Wrap a measuring tape around the natural waistline, keeping it parallel to the floor and comfortably snug. Record the measurement in inches or centimeters.

Rephrase this sentence in prek.

To find out how big or small someone's tummy is, find the part where it looks the skinniest on their body, usually above their belly button but under their ribcage. Put a long piece of tape around that part, making sure it's straight and not too tight. Write down the number you see on the tape in numbers or centimeters.