Mint matchbox labels arranged in a pair, a single row or column or several rows or columns cut from a printer’s sheet (q.v.), often comprising a set and usually being originally sourced from a match factory. It is recommended that a block remain uncut unless you can arrange to have it accurately cut into separate matchbox labels using a guillotine. Badly cut labels, especially with scissors can be made worthless.
Note that some dozen labels have the appearance of a block of two. Sometimes the only difference between such dozen labels and their matchbox label counterparts is the absence of crop marks in the apparent block.