I need to figure out which size of display to buy, as for now we're not using the flexible fiber. On first look it seems that either a 3.5 inch or a 4 inch HDMI display would do, such as this one. Is it possible to estimate the size based on the models that we have?

Update: I couldn't find a European source for a 4 inch so I went ahead and got the 3.5 for now since it wasn't too expensive. But should still check

Ok! understood about 3.5 display! i will bear in mind these dimensions while designing the body

So in the end I got the feeling that 3.5 is too small and I ordered also a 4.3 inch and 5 inch. Here are the exact measurements:

• 4.3 inch: https://www.waveshare.com/4.3inch-hdmi-lcd.htm
• 5 inch: https://www.waveshare.com/5inch-hdmi-lcd.htm