Size in Thai

“Size” in Thai is ไซส์sái.

ไซส์ sái

size (of clothes: S, M, L) noun

  • sái high
  • High: start high and go a little higher, a bit tense; don’t let it fall.

From English 'size', said with a high tone. Sizes are the English letters (S, M, L, XL); shoes and jeans use numbers.

How to use it

Clothes sizes are said the English way: S, M, L, XL. Market clothes are often "free size", ฟรีไซส์frii sái, one size meant to fit everyone, and Thai sizes run small, so try things on. For shoes Thais ask for a number, เบอร์boe, usually the European size: ใส่เบอร์อะไรsài boe à-rai, what size do you take?

Other spellings you'll see

There's no single official way to write Thai in English letters. We mark the tone of every syllable; online you'll also find:

  • size

More shopping and money in Thai

All shopping and money
  • เงิน ngoen Money
  • เงินสด ngoen-sòt Cash
  • บาท bàat Baht

    baht (Thai currency)

  • เหรียญ rǐan Coin
  • แบงก์ báeng Banknote
  • บัตร bàt Card

Learn this word in Unit 17, free

Unit 17 · Bargain hunting · Clothes, sizes and fit. Short lessons with audio for every word, speaking practice and spaced review. No sign-up needed.

Written by the Learn Thai For Free team
Audio: AI voices, quality-checked for tones