Olixar provided some of these schematics to 9to5Mac.
Their sources claim the SE 2 will look like a smaller iPhone X from the front, but the sides of the device retain the straight aluminium edges of the current SE design, harkening back to the iPhone 5 era.
The purported dimensions of the device are about 12.1cm x 5.5cm. The notch region is measured at 1.87cm wide, much smaller than the notch on the iPhone X. It's speculated that Face ID may not be present allowing Apple to narrow the notch; however, if that's the case, device unlocking would be limited to PIN only as there is no Home button for Touch ID.
While it's more likely that Apple will just unveil a new iPhone SE with a spec bump, these schematics align with another supposed leak from Tiger Mobiles who claimed to have seen CAD drawings and created iPhone SE 2 renders based on those drawings.
Apple recently received EEC certification for eleven new iPhone models. While unconfirmed, it's thought that all eleven may all be variants of the new iPhone SE 2. The new device could launch as early as this month.
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[New screen protector vs. current iPhone SE]