The Size

As this is a guide that will be used when out and about/ cycling through Krakow it needs to be easily accessible. My idea is to create a guide small enough and thin enough to fit in your back pocket/ the pocket of your bag/ backpack. To get an idea of how small I would need to make it I did some research into the average back pocket size and found out that it is 4-4.5 inches.
Something commonly kept in a back pocket is a wallet so I looked at the average width of these, my book will most likely be longer than the average wallet but it will be somewhat thinner and possibly the same width. Wallets most commonly measure 3.5-4 inches and when open the entire wallet is 8.5 inches in length, they can expand to 2cm in thickness.

http://www.dimensionsinfo.com/wallet-size/


Another item typically found in someones back pocket is their phone. As most people have an iPhone or a phone similar size to this, if not smaller, I researched into their dimensions and found out that iPhone 6/7's are 2.6 inches wide.

My publication must be less than 4 inches wide.

When thinking of a book that is known for fitting in a back pocket I thought about about a passport, how it is thin enough to slightly bend and small enough to fit in your pocket.
Eu passports are 8.5 cm wide, 12.5 cm in length and 0.25 cm thick. Most passports are 32 pages but countries such as Ireland have 64 pages.