@BatElite yeah, you need a very small ruler to measure them!

@BatElite @lizardsquid it refers to the position of the tongue in the mouth when making the vowel sound. if your tongue is close to the roof of the mouth (like the vowels in boot or feed) it's a "high" or "close" vowel, if it's more on the bottom of the mouth (like the vowels in math or paw) it's a "low" or "open" vowel
-F

@BatElite @lizardsquid there's also the other dimension of front/back, referring to how far forward the tongue is when making the sound; the boot and paw vowels are back, while the feed and math vowels are front
-F