Tantive IV was 150m in Legends and the OT.Tantiv Iv Lengt 126.6 M
Star Jewel Lenght 160 M
that approx 25% extra lenght
Then Lucas Films messed up the modell in Episode III which was a lot stubbier then the one in EP IV.
They even admitted it, which lead to the introduction of the CR70 which is 126m long. So the ship in Ep III isn't the Tantive IV.
The FFG modell ist the 150m version.
Disney seems to have retconned all CR90s to be 126m long.
The appearance in ANH can be confirmed to measure approx 150 meters by comparison to the ISD that is on screen with it in several scenes, unless the Devastator has been shrunk too. I don't give a bantha poodoo about what the wiki or Dizznee says, the Rebel Blockade Runner is a lot closer to 150 meters than 125 meters. Dr. Saxton would be rolling in his Aussie grave, if he were dead.
I totally approve!

