Just a little square that I worked up to use for afghans or scarves, etc. Chart uses standard symbols. Key is in English with both UK and US terminology.
Written uses standard abbreviations in US terminology, with information for UK crocheters.

Sample is worked in a sport-weight recycled yarn (from a thrift store sweater) with an E/4 (3.5mm) hook

Sample measures 2.5” (64mm) across

Feel free to use this square to make products to sell, or incorporate into your own pattern.