As an alternative approach to using card for IABSM try this. Some U.S. IABSM-ers have been
using Poker chips instead of cards for motivation. I thought we'd give them a try. The chips I
found measure 38mm across and can easily take 19mm diameter white stickers found in my local
WH Smith branch. These are large enough to write info and unit identity on them.
Easier than shuffling, chuck them in any bag (- I use a small Soviet style nap sack) and draw them.