Korean Syllable Blocks
Instead of being written sequentially like the letters of the Latin script, Hangul letters are grouped into blocks, such as 한 han, each of which represents a syllable. That said, although the syllable 한 han may look like a single character, it is actually composed of three letters: ㅎ h, ㅏ a, and ㄴ n.
Each syllabic block consists of two to six letters, including at least one consonant and one vowel. These blocks are then arranged horizontally from left to right or vertically from top to bottom.
There are 9 main types of layouts as shown below.
A final consonant, if there is one, is always written at the bottom, under the vowel:
A complex final is written left to right: