1. Your boosters are slightly less than 25m tall, the ones on the GSLV mk.3 are 25 m tall. OK!
2. Your core stage is 23 m tall. The one on the GSLV mk.3 is 21.39 m tall (which you can round to 21.5). Not ok!
3. Your upper stage is 12 m tall, the one on the GSLV mk.3 is 13.5 m tall. Not ok!
4. The entire rocket is 43m high, it should be 43.5m high. Not ok!
All diameters seem ok.
You can ask for advice, but don't just post the rocket again for us to check if 2, 3 and 4 are NOT FIXED.
if you're tired, just take a break for as long as you want.