I'm looking to purchase an LV agenda. I know that i want a monogram one but i don't know what size? originally i was looking for a pre-loved mm size but now I'm thinking about getting the pm size. I think both would work for my life style. i don't write a lot in my current agenda just some appointments and when certain monthly bills are due. I would like to carry the agenda with me in my purse but i have big purses so both size agendas would work. what size would you recommend and why? Thanks in advance!