Thinking about resolution purely, for decent print quality it’s wise to stick to 300dpi, maybe 240. We used to aim for 300 for our print work, and accepted a minimum of 240 if we had to
10MP = about 3648px wide x 2736px high (assuming ‘normal’ aspect ratios)
3648px /300dpi =12.16″
2736px /300dpi = 9.12″
3648px /240dpi = 15.2″
2736px /240dpi = 11.4″
So, 12 x 9″ would be fine, 15 x 11″ would be about passable, anything larger than that may end up looking jagged. Of course, careful use of Photoshop or similar can give you a tiny bit more leeway.
Edit: Are you talking to yourself up there?