Thuluth

The script is used in the flags of Saudi Arabia and Afghanistan, where the text, Shahada al Tawhid, is written in Thuluth.

An important aspect of Thuluth is the use of harakat ("hareke" in Turkish) to represent vowel sounds and of certain other stylistic marks to beautify the script.

The stylistic marks have their own rules regarding placement and grouping which allow for great creativity as to shape and orientation.

The Muhaqqaq script was developed by widening the horizontal sections[clarification needed] of the letters in Thuluth.

The Naskh script introduced a number of modifications resulting in smaller size and greater delicacy.