Student or Learner
which one is correct
a small world
an small world
what i understand is that 's' in small has a sound of vowel 'I'. which is causing the confusion.
Whoever told you that is quite incorrect.
The letter "s" is pronounced "ess", but not when used as a consonant at the start of a word, so A small world.
When you spell "small" you start with an "s"