Okay, I have a headcanon for Lloyd's first gi. So, where did Lloyd's gi even come from? This was the thought that came to me last night. And of course, I already gave myself the answer: The First Master of Spinjitzu.
Just imagine how he first wrote the prophecy about the green ninja, and then personally sewed the gi for Lloyd. Garmadon and Wu simply stood aside and did not understand why their father was making a green suit with a sweet smile(He deliberately made it larger because he knew about tomorrow’s tea).
But FSM didn't pay attention to the looks of his children, because he was busy thinking about his sweet future grandson.
This theory/headcanon makes a lot of sense and I agree with it.
I also have my own about how FSM left a lot of things for Lloyd such as his sword (we see in the flashbacks that he fought with it and I also have a headcanon that he was the best swordsman in ninjago history, Lloyd is the second best after him because he inherited it from his grandfather) , notes about various beings and instructions about the golden power (according to me, the notes could have been hidden in the temple of light or what it was called, I don't remember and I don't feel like checking)