Specific Bluetooth keyboard recommendations

Hardware and Accessories

All, I want a Bluetooth keyboard with large keys. I know the Apple ones have them, but, if possible, I would like to get something comparible that is cheaper. A num pad on the keyboard is nice but optional. I will use it with an iPhone, probably nothing else. I've seen the Logitech K480 and K780, but I'm not sure how they differ. Please provide specific recommendations of model numbers and companies. Because I'll be typing rather quickly, at times, I need something with larger keys. Smaller keys usually lead to more mistakes with me, so the closer it is to a regular keyboard, the better. Thank you.