Does this come creased like the packaged set of Strathmore cards/envelopes?
This particular item is card stock, it is not cards and envelopes.
is this 100% cotton?
No, this is a felt finish card stock, but it is not cotton.
Since the deckle is only on one 8-1/2 side, do you have this same cardstock without the deckle edge?
I want this card stock for wedding menus. Should I get 80 or 100 lb?
Either weight would work for wedding menus. This would be a personal preference of the person planning the event. Please feel free to request samples if this would help you better choose which is best for you.
Is the soft white like the Tiara White from Neenah Teton?
The soft white is similar in color to the Teton tiara. They are not a perfect match to each other, but it is similar in color.