There are smaller dumbphones than the Nokia 6300. For example the Nokia 2720 Flip is smaller wile closed. The Punkt MP02 phone is also a bit smaller. There are

There are smaller dumbphones than the Nokia 6300. For example the Nokia 2720 Flip is smaller wile closed. The Punkt MP02 phone is also a bit smaller. There are also credit card sized dumb phones like the LightPhone (pricey), the Kyocera KY-01L (Japan exclusive) and the Talkase (defunct). But you are right this phones like the Nokias and the Punkts are a bit thicker by around 5-7 millimeter than the MOTO F3. Looking at the phones it seems to me than it's because of design choice. The Nokias have photo capabilities (not the MOTO) and the Punkt have a reinforced plastic body.