Stress -
water stress due to lack of it in my case.
For me this condition of uneven sized leaves happens all the time when I am away for a few days. This is especially evident with the plants in the smaller pots. When I am around, they are pampered with at least 2-3 times of watering a day. When I am away, my sis comes around and waters once a day. So when I get back from my trips, they will look like idiots till the next leaf.
