Hi everyone, I need to buy a new Gi. I'd like to buy a Tokaido Kata Master Athletic or Kata Master. I'm 173cm and have 69kg. Should I buy the 4,5 size which is for 175cm, or should I buy the size 5 for 180cm. I own now an Arawaza Kata Deluxe size 4,5 for 175cm, and it's fine but the trousers shrinked at least 2cm. Any help with Tokaido karateGi's?