Ok so i plan on getting two of these hides (CLICK THE LINK)
http://www.reptilebasics.com/hide-boxes/

Which size should i get for a 28qt tub with a 6 month old about 19"- 22" female ball python.Should i just get the extra small ones or should i get large.It would really help me if you could send measurement of the hides like these you have or which one would fit the best in a 28qt tub.Thanks!