I had to look into Wikipedia to get real name for the hat (it's called "cylinder" in russian) and I still might have some parts named incorrectly - english is not my native, it's also my first instructable so please don't judge too hard. I'll greatly appreciate all corrections.
Step 1: Get playing cards and stapler
The fastest way is to go to closest pharmacy - they always have different decks for sale (for some reason I like classic Bicycle decks for these projects).
You can also buy decks in bulk in your closest Costco, BJ's club or similar.
Most popular decks have red or blue backs and regular pocker faces but if you have some special project and you know where to look, you can find black backs, white (yes, empty) faces or even some colored ones.
As for stapler, you can buy the simplest one as I did or go for signature staplers like this red swingline stapler from Office Space movie.
Step 2: Attaching cards for the top
First, we want to make a top of the hat so we need to attach cards in a line long sides next to each other.
- Staple two cards overlapping them just just enough for one staple (you can quickly measure it by aligning one card to touch the circle on another card). Just staple them next to short side of a card.
- Check the other side to see if you stapled through both cards
- Keep stapling them to make a line of cards (amount of cards depends on a size of the target head - I got 15 and it was a little bit bigger then needed).
- Staple the last card to first one and try it on your head - it should fit relatively tight).