Well, since I have some experience in this area myself (since we already finished blender lessons in collage), it shouldn't take too much time. This of course is affected by multiple factors such as tiredness, general knowledge, how complex is the design of an item, layering and putting on different textures etc. The coding is also affected by factors such as the game engine or if you wish, how it works (regarding model inputs, texture processing and so on...).
For something like a shirt they already have the model stuff done, so it's just retexturing and such. But I'm not sure how long new models take. It's something that would be interesting to know, but then people would flip out and do the math when something is "taking too long".
"Well you see, if it takes 6hrs to do this, then you only have like 12 of those, and I'm sure you have more time to do this.... laziness is what I call it"
I'd rather it's so whimsical that it just comes to us. Like magicccc
Aww.. I heard the Sci-Fi update was here but I just noticed it was pack things. Was expecting it to be a new dimension or new mines-like things where you could get moon blocks and such, besides the pack.. So is this only for cubits capitalists or am i unaware of something?