These are
envelope templates (for 4 1/4" card) measures 4 and 3/8"
and liners to put patterns in their flaps.
PDF files attached below:
1) ENVELOPE SCORE GUIDE 4 and 3/8" envelope (to fit a 4 and 1/4 inch square card)
2) ENVELOPE with NO Score lines (same size)
3) envelope_LINERS to fit
THE ENVELOPE:
There are two styles of envelope template here: one with dotted lines and one with just tick marks to use as a scoring guide (my fave).
Pointers for envelope use: Print template and score using the tick marks as a guide.
Cut along solid lines & fold.
For custom patterned envelopes:
1) print envelopes on the back of patterned paper
or
2) print a digital pattern on the other side of envelopes
or
3) fill envelope template in photoshop with patterns
(use edit>define pattern to make patterns)
THE LINERS:
Pointers for liner use:
Print template and score along dotted line.
Adhere liners into top of envelopes before assembling them.
You could print it & trace one on patterned paper to save a lot of paper
or
For custom patterned liners:
1) print liners on the back of patterned paper
or
2) print a digital pattern on the other side of the liners
or
3) fill liner templates in photoshop with patterns
(use edit>define pattern to make patterns)
Hope they're useful to you,

)
Mel
P.S. If you'd like standard size envelopes, there are two sizes linked in this post here on my blog.