The 225/60/15 would fit great. that's about 25.6 inches tall overall with plenty of clearance under the wheel well. You don't want to go much taller than that. The 265/70 would be closer to 29.5 inches tall - much too big. I went with 245/45/17 which is about 25.7 inches tall. You can estimate different tire sizes at
Wheel / tire size calculator / comparer - WHEELSMASTER
Keep in mind that the first number is the width in mm, while the second is the width of the side wall relative to the width. So on a 265/70 the side wall would be about 70% of 265mm.