Envelopes Martha Stewart Scoreboard

I recently put together some very thick cards for our 13 grandkids and discovered afterwards that the cards did not fit in a standard A2 envelope!  I didn't like the finished sizes of the envelopes provided on the triangle, so I experimented with my Martha Stewart scoreboard for a thick A2 envelope, a 6" square envelope, a 3" square envelope, and a gift card envelope.  This is what I came up with:

Envelope - Thick A2 Card:

Cut paper 8-1/2" x 8-1/2"

Score sides A & C at 3"

Score sides B & D at 3-3/4"

Envelope - 6" Square Card:

Cut paper to 9-3/4" x 9-3/4"

Score all sides at 3-3/4"

Envelope - 3" Square Card:

Cut paper to 5-1/2" x 5-1/2"

Score all sides at 2-1/4"

Envelope - Gift Card:

Cut paper to 4-5/8" x 4-5/8"

Score sides A & C at 1-1/2"

Score sides B & D at 2-1/8"