First of all, let me rant that there are NOT NEARLY ENOUGH options in this perfect size!! This is such a great size to carry around everywhere, and even a daily book is still very portable in this size. So, planner companies, I want to see lots more options in this size!
The good news is, there are several options available in this size, in daily or weekly formats.
The Quo Vadis Textagenda (academic-year) and Quo Vadis Notor (January-December) are the same size and have the same format with the schedule at the top of the page and the rest of the page lined for lists and notes.
|Quo Vadis Textagenda and Notor format|
The Quo Vadis ABP2 is also in this size, you can read my review of it here. I have to admit I was really disappointed with this one (you can read why in my review), and I gave it away.
|Quo Vadis ABP2|
New for 2014 the Quo Vadis Daily 17 is in this same excellent size with a traditional timed format. I'm really excited to get this one when it comes out! But I'm a little worried about how narrow the ruling will be. You can right-click on the image on the product page in the link above to see a larger image of the daily pages. ***Update: you can click here to see my review of the Daily 17.
I can also recommend the Undercover UK small diary which I have reviewed here and here. Its recycled leather cover comes in tons of colors, so you are sure to find a color you love from traditional, brights, pastels, neutrals and metallics.
Another daily planner that is available in this size is the Cavallini Moderno diary (which you can see here on the Jenni Bick website and I have also seen them at The Paperie UK but they are now out of stock for 2013). Even though the leather cover is beautiful, it is so stiff the book does not stay open and I abandoned it for this reason, which you can read all about here.
Paperblanks makes diaries in this size too (their Midi size), in daily and weekly formats. You can see my review of them with lots of photos here. The Paperblanks planners come with lots of beautiful cover options.
Quo Vadis makes weekly planners in the 10 by 15 cm size (4 by 6 inches) which is very nearly the same size. Check out their Business, University (academic-year), Horizontal 15 and Note 15 planners. (Links shown are from Quo Vadis UK, which ships worldwide). I haven't tried any of these exact planners, but you can't go wrong with Quo Vadis's superb quality and luxurious paper.
Another Quo Vadis planner that is nearly this same size (16 by 16 cm, 6 1/3 by 6 1/3 inches) is the Executive, which I have reviewed here. It is available in the US and from Quo Vadis UK.
If anyone knows of any other planners/ diaries in the 12 by 17 cm (4 3/4 by 6 3/4 inches) size please post a comment! I love this size and I would be very interested to know other options.