At a rubber stamp store, I found 4x6 sheets in a pack of 20 that are perfect for window cards. The same company also packs them in 8 1/2 x 11 sheets. I think the weight is a big thicker than office supply transparencies. Also, at craft stores, check the stencil aisle for acetate sheets and check the mosaic aisle for kinda thick sheets that are designed for sun catchers.
Mary Beth
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