Change size (text only), I want to play a "small" trick

[chimeforest]

Hello everyone

I'm starting a new campaign soon, and I want to play a cheeky little trick on my players. I'm going to be making custom races for them to choose from.. I want them to think they are playing medium size creatures, but in fact are playing small creatures.

I would like it so that I can change the size text to say Medium, but they get all the benefits/weapons/stats/etc from small. My players are new enough that I'm hoping they won't notice that their dagger is 1d3 instead of 1d4.

I tired copying the Size Category Adjustment, hoping that I could get the timing right to increase the size to medium for the output text, and then revert it back to small before the stats are calculated. But I haven't had much luck with that.

Is there a way to just change the text for the size? If not directly, could I do it as described above if I got the timings just right?

Any help is appreciated,
Thank you,
Chimeforest