Stitching on card is one of my favourite techniques when it comes to making cards, and there are two websites where I get most of the patterns. They are Stitching Cards and Form a Lines . Both sites offer a range of patterns for (currently) £1.36, but they both have a smaller range of patterns that are free to use, and which I have permission to share in a 'class'. I did that recently, and we had some lovely results - using machine embroidery thread and 300gsm white card.
Beryl used a pattern intended as a bookmark, but made it beautifully with some extra white space.
Dominique made this lovely wreath and decorated it with beads and other embellishments.
Jyotsna stitched this lovely birthday card completed with a stamped sentiment and some sticky gems.
Nadi also chose to use the wreath pattern, but added some rather clever extra beads as well as sparkly additions.
Shilpa made this lovely birthday card and put her own spin on the stalks and leaves.
Tricia also used the wreath pattern (well, it is December) and finished with some glitter dots.
There are other ways to stitch on card, and some companies sell dies for the purpose. Spellbinders have done some good ones, although they do make non-standard sizes as almost everything they produce is aimed at US A2 sizing which is a pain. However, the dies can be used on a 6 by 6 cards with some additions. This was stitched on thinner card (to help with cutting) and with Perle Cotton as the holes are bigger. (Dies from other Marianne were also used, as well as sticky beads.)
It's also possible to use finer thread - and metallic thread works well as the larger holes are more forgiving than the ones you prick for yourself. Here, the bauble was stamped using a very old Chocolate Baroque stamp.
There should be more photos when all the cards are finished!