It kind of works but is very cheaply made and hard to open and close. Won’t stay in position but if you force it to it will measure a fish accurately
Worked great to create a custom space for displaying a large map. The only draw backs were its not very thick so standard stick pins only go in a short distance and the provided sticky tabs are of varying thickness so there is some edge to edge and color variation when tiles are placed adjacent to each other. Inexpensive solution though to covering a large custom sized area.