fossorial tarantula enclosure size advice

im looking to put all of my fossorial spiders in new enclosures, id like all of the enclosures to be the same make as im ocd and like all my enclosures to match, would you guys say that a 20x20x30cm enclosure would be good to house a fossorial tarantula in for its whole life, or should i go for a 30x20x30cm enclosure?, im hoping to use the enclosures for adult tarantulas not small ones, so these enclosures would be their permanent home

https://www.reptilecentre.com/products/prorep-terrarium-300x210x300mm

https://www.reptilecentre.com/products/prorep-terrarium-200x200x300mm