Re: What kind of carpet does this look like
I would agree, a mix...
I have always gone with the 2/3 length rule for enclosure widths for adults. So if the average adult is around 6 feet (roughly), a 4' would be great. A good friend of mine who breeds coastals, jungles, and IJs (and whom I have purchased my JCPs from) uses the same rule. A 4x2x1 or slightly taller will usually work great. Though where I live, keeping humidity at a decent level in tall enclosures is an issue so I try to keep height on the lower end. My current JCP female is in an Animal Plastics T8 with a divider. A T10 would give you a 4x2x15", a T11 would give you a 4x2x18", and a T12 would give you a 4x2x24". I can adjust the divider to give her more room as she grows.
Re: What kind of carpet does this look like
Definitely coastal. She looks like my coastal and she's a jag sibling from AC reptiles. You gotta love carpets. She's a beautiful carpet.