Simple storage for your alcohol markers. I use the 25 count ones. They are 8cm X 8cm and take up very little space. Idea if you have heaps of markers. There are also 50 count and 100 count models (same measurment in multiple of 8cm) for those needing more storage. There is also a singe test marker holder if you have an odd ball marker you want to test fit before committing to a larger print.