Double fold cards have three panels and two fold lines. The design is stitched on the centre panel. When the stitching is finished the right-hand panel is folded inside and fixed with card adhesive or double-sided self-adhesive tape. This hides the back of the stitching.
Designs on our sister website Form-A-Lines, fit a card size of 104 x 152 mm (4 x 6 inches). This is a standard card size that is readily available in the UK.
I have been asked by Joyce, a Form-A-Lines customer, where she can obtain square double fold cards suitable for the PinBroidery patterns in the United Kingdom. The good news is that Craft Creations manufacture 144 x 144 mm double fold cards in a wide range of colours and finishes. They are available directly from Craft Creations by mail order. They should also be available from retailers who stock Craft Creations cards.
I regret that I do not have knowledge of the overseas craft market so can not advise where to buy square double-fold cards in Australia or the USA. However, if any of our readers know of a source of supply then please let us know in a comment to this post.
The 144 x 144 mm card size is particularly important to British customers because the British postal service make an extra charge for envelopes larger than 165 x 240 mm. There is a standard office size envelope called C5 which is 162 × 229 mm. This takes an A4 sheet folded in half once. Since A4 sheets of card are readily available in the UK this would make an ideal blank card to mount your PinBroidery 144 x 144 mm stitched card on. Your cards would then go into the British postal system at the normal letter rate.