Nomad makes some of my favorite leather cases, and its lineup of iPhone 17 cases hasn't changed too much from what it was offering for the iPhone 16, except that it's now making trimmed-down leather cases for the iPhone Air that leave more of the phone exposed (it's a great iPhone Air case, but expensive at $89). Once again, its "sustainably-sourced" leather cases come in two grades of leather: the standard variety and a higher-end Horween that costs $20 more. They both develop a "rugged" patina as the oils from your skin interact with the leather over time. Nomad's Traditional Leather case starts at $69, while its Modern Leather Case ($59) is a little cheaper because it's not completely wrapped in leather (its sides aren't wrapped).
If you're looking for maximum protection in a leather-styled case, you can opt for the Leather Rugged ($79), which has 15-foot drop protection compared with the Modern Leather's 8-foot drop rating. Nomad doesn't give a drop rating for its Traditional Leather case, so one can assume it isn't as protective. I can attest to it having at least a 4-foot drop protection because I've dropped my phone from that distance and it survived just fine.
I also like the Modern Leather Folio wallet case, though I wish it converted into a kickstand like some wallet cases do, and the more affordable Sport case ($50) and Rugged case ($50 -- without leather). They're both not leather cases, but they do look pretty slick. It's also worth noting
Type of access to camera control button: Most of Nomad's iPhone 17 cases, except for its iPhone Air cases, feature a touch-sensitive integrated control button cover, which is new for this year (they had cutouts before). Its new iPhone Air cases leave the button fully exposed.