1 of 2 photos
The shoe is medium-to-narrow in the toe box, continuing back through the arch. The toe box was a little on the narrow side for me, but not uncomfortably so. The heel is well padded and is built with a small heel loop on the back for an easy entry in a tri.
2 of 2 photos
The heel-to-toe drop is 8mm with the heel sitting at 21mm. It's just a little too much drop for my personal taste but, of course, much less than the 12mm drops typical of most shoes over the past generation prior to, say, 4 or 5 years ago. When the Solanas arrived I took then out for a run. The immediate sensation was springy, bouncy, like the midsole was spring-loaded, like I was propelled forward. So far, so good.
But that great feeling was, by about 3 miles, overshadowed by irritation on the lateral malleolus (the Kathy Bates bone, if you saw the movie "Misery"). The eyelet row protrudes further back than most other running shoes, leaving little clearance for the malleolus than is typical. This is an occasional complaint with running shoes, but for my morphology it's pronounced with the Solana.
Since that run we've had time to see how the customers in our store react and, unprompted, it's a complaint reported by a significant number.