One leaf is super small, is it normal?

Hiya mate Cut a bottle in half and Place it over your seedling spray the plant and bottle with worm water and she will grow fast and them small leafs will soon be forgotten about

@Burrito Hi mate whilst you dont see them like that very often it happens occasionly and is nothing to worry about Just a slight genetic mutation

Hi Burrito, your humidity is very low. It should be 60 % - 80 %. If you don't have a humidifie try to raise it. (Boiling water ? Wet towels ? ...)