Hey! So, about the Gator GB-4G-UKE-SOP gig bag, it's made for soprano ukuleles, but unfortunately, we couldn't find any specific interior dimensions listed by the manufacturer or in our research.

Generally, it'll fit most soprano ukuleles, which are usually around 21 inches long.

Aside from the size, this bag seems pretty robust. According to the manufacturer, it's made from sturdy nylon and has GFLEX 20mm padding all around, which should offer good protection for your uke from everyday transport mishaps.

They've also included reinforcement for the headstock and bridge area to help with wear over time.

For carrying, it's got padded backpack straps and a contoured back, making it more comfortable to lug around. There's a reinforced handle too, though our research didn't say if it's double-stitched.

Some feedback we've seen mentions the handle is well-reinforced, but someone pointed out it could use more, especially if you're carrying a heavier instrument for long periods.

If you need exact dimensions, you might want to dig deeper into reviews or reach out to Gator directly.

But overall, it looks like a decent option if you're into a bag that's both practical and protective. Just remember, for really heavy instruments, you might need to think about extra carrying options.