'The Wild Area' in Pokémon Sword & Shield is about "two regions from Breath Of The Wild" according to a rep from The Pokémon Company

Early impressions from media outlets getting hands-on time with Pokémon Sword and Pokémon Shield seem to be very positive. Not only are impressions positive, but lots of new information on the game has been slowly coming out, including details on how large The Wild Area will be. According to sources from Metro, a representative from The Pokémon Company gave an estimate for how large the open world area really is. "Two regions from The Legend of Zelda: Breath of the Wild" is a very large amount of space for some nice Pokémon exploration.