Hi Chris,
I'm not a CC yet so can only speak from experience of being on the receiving end of leaflets.
I personally find that A5 size, white background with coloured print is better (not black). A5 will fit on the fridge or sideboard or kitchen drawer along with takeaway menus. Anything bigger will get binned anything smaller will get lost.
Again personally, content and ease of pricing up are a big benefit. The last cc I contracted in stated a fixed price on his leaflet for a 2 bedroom house including stairs and hallway/landing. Then it had the odds and ends such as oven cleaning, curtains etc. I binned the last leaflet I received which stated prices for lounges 12 x 12, separate prices for stairs etc. I'm not going to worry about measuring my lounge or that the price may change once the cc's got here. Def add details of stain removal so that it's known it is not part of the general cleaning.
Some of the leaflets I receive look absolutely naff. Stick to simple, professional, with as many contact numbers as you can plus the company name/logo and you'll catch the eye and memory of most women. Also you'll be able to use the same print each time without having to change title's such as Spring Cleaning Special Offers.
Like I say, I'm only speaking from personal experience and many others may say I'm talking out of my backside
. Unless told differently, this will be my approach when I eventually start up and feel the need to leaflet.
Cheers
Cheryl