Blinkytape Controller is a 10mmX26mm NeoPixel controller. Blinkytape provide the heatshrink tubing version for it which is with the JST connector version.
But if you want to build a little fancy case with cable strain relief for the controller. Also want to make the case as small as possible. I draw a case with snap hook edge.
Printer is Prusa MK3
Print with support material and 0.15mm/quality setting
The author hasn't provided the model origin yet.