Is this what you mean: https://www.hometalk.com/40670621/everything-you-need-to-stencil-your-tile-floors-for-less?cid=7763996#c-7763996?
They just did that so they could paint the floor.
Wrap the basae of the toilet with painter's tape so you dom't get any paint on the toilet, remove the tape when done.
Use masking tape, and cut it to fit if it won't stretch around. Best wishes.