Reporting back on the difference between size 40 and 40.5. For reference, the 40 was purchased last Feb and the 40.5 was purchased 2 weeks ago.
To my surprise, the 40.5 feels SUPER tight across the H cutout. I couldn’t walk in them for more than 5 mins without losing circulation in my foot. The 40 was comfortable straight out of the box.
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You can see from the photo that the H cutout on the 40 is slightly bigger than the 40.5. I suspect that they were produced from different factories…
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(FYI, My left foot is half cm longer than my right foot)
In regards to the length difference, the 40.5 gives me more space between my toes and the top edge of the sandal, but my foot doesn’t sit comfortably within the contours of the footbed. Whereas the 40 fits my foot exactly and feel the footbed hugging my foot in the right places. It might look like my toes are hitting the top edge in the 40 but I don’t feel it when walking in them.
In conclusion, you might have to play Goldilocks and order a few different pairs to find one that fits you. If you don’t want to do that, I suggest going with your Oran size. The sizing guide on their website is highly inaccurate so don’t use that when choosing your size.