You will need to consider the siding and roofing materials you would like to use to finish this space. And you might weigh the quality of exterior materials against their visibility. Also in the cost of the addition, be careful to factor in the permits needed and the work needed to prepare the foundation.
Envelope size - 4-3/8 x 5-3/4. Card paper size - 5-1/2 x 8-1/2 (half a letter sized sheet). Finished card size - 4-1/4 x 5-1/2. A4: Envelope size - 4-3/4 x 6-1/4. Card Paper Size 8 x 12-1/4. Card finished size - 4-1/2 x 6-1/8.
A4 was obviously the right size for these purposes. Today, it is used for all printing, letters, magazines, forms ... that can be found in everyday life. A4 is a half an A3, quarter an A2, for larger sizes, and corresponds to 2 A5 sheets, 4 A6 sheets or 8 A7 sheets for smaller sizes.A4 is majoritly used for letters, pinting documents, magazines ...4 was obviously the right size for these purposes. Today, it is used for all printing, letters, magazines, forms ... that can be found in everyday life. A4 is a half an A3, quarter an A2, for larger sizes, and corresponds to 2 A5 sheets, 4 A6 sheets or 8 A7 sheets for smaller sizes.