The install size for Fifa 18 on Xbox One X has been revealed coming in at a large size with the enhanced option being available starting October 31, 2017 taking up a total of 45.80 GB on the Xbox Marketplace. The base model size is 44.89 GB. The install size was grabbed from the console with the game having been given a large update and it now showing up under "Xbox One X Enhanced Games" tab. The option to turn on 4k assets for games is present under "Settings - System - Backup & transfer - download 4k game content". These install sizes should be the final number or well close as sports games don't typically get too many large updates post launch.
Fifa 18 is the latest entry in this Football/Soccer simulation that brings the existing experience with an updated roster and another season in the story mode for Hunter. This is a mix of conflict between the strange new Swarm menace and the angry COG leaders. The entire game is presented at 4k (3840x2160) on Xbox One X with HDR at 60fps. This is present across the entire game, the first of any sports franchise to reach this on a console. This will certainly set the design of the other EA Sports titles as they share the Frostbite engine technology and assets.