Thanks for your query.
Minor differences in size of labia majora
& minor is normal .Gross difference always needs gynec .opinion to find the cause & treat it.Vaginal cyst
cyst is common .It is not the vagina ,but the labia which you can see have size difference.
‘Hope I have answered your query, I will be available to answer your follow up queries, “Wish you Good Health and trouble free speedy recovery”