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.
C4 envelopes are perfect for the larger C4 card blank. The size convention for a standard sized C4 Envelope in the UK is 229 x 324mm. Quality is everything to us. We believe the envelope is as important as the message it contains. C4 envelopes have a variety of uses from standard greeting cards envelopes to mail shots and a variety of business applications.