Insert for the Arkham Horror: Living Card Game (first edition) core/base box, sleeved with medium grade sleeves (Sleeve Kings). It also works for the slim boxes that held each expansion or cycle.
Sizes are in CM, so the slicer may ask you to auto-resize, just accept the prompt.
Created with my insert generator using Blender's Geometry Nodes, available in https://github.com/soy1bonus/BoardGameInserts
The author marked this model as their own original creation.