29 weeks appointment with midwife

So i was supposed to have my appointment with the midwife at 28weeks but there was none available until i turned 29weeks. I went in today and everything came back normal. I was wondering how much your baby measured at your 28/29weeks.. my baby was measuring at 27.4cm (they measured me with a measuring tape). I dno if thats too small for how far along i am or if its normal. My midwife didn’t seem concerned. I need your opinions please!! FTM WORRIED AF!