I’ve measured that section before, and the distance between those two crease lines should land right around 42–43 mm
The surface isn’t perfectly flat either; it has a slight inward bow from top to bottom
If you want to double-check against your photo, I sometimes just measure on screen to get a...
Got a little bonus like that with a purchase last year—a backpack and a small gift card. I used https://giftcardmall.org to check the balance and manage the card before spending it, which made everything super simple.
