True that vaginas expand immensely and look very different from what they used to before childbirth? or do they go back to normal size? (not hymen)

Back to normal size: Women (and their body parts) usually go back to "normal size" after delivering a baby. The issue here is actually, "What is normal size?" What is normal after having one baby, is not the same as what was normal before having a baby. Likewise, a NORMAL 30 year-old woman does not have the same identical features as a NORMAL 20-year-old woman. Everyone changes over time and through events.