Im just going by my own 2 boys who are extremely active during the day aswel as night, i like to give them enough room to carry out their adventures and if i had a female royal the same (which im sure they all are at night) she would be in larger then a 3 foot as i wouldnt like to think of her exploring and doing laps when she comes alive at night but not having much room to do it (which is why i wont keeo royals in rubs)

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Promoting Quality Care Of Boas & Various Geckos
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Artisan Reptiles - Facebook
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Lover & keeper of Boa Constrictor - Morphs/Commons/Dwarfs/BCI/BCC/BCA
plus
various Day, Satanic Leaftailed, Leachianus, other Gecko species
&
Western Hognose among other beautiful creatures!