Congratulations! Pretty egg! That was one thing I noticed with my EEs also -- big eggs from the very first. I could hardly believe when my sweet, petite little Pearl laid her first egg and it weighed in at 60 grams. I think she must have some Leghorn in her.
Aw she looks just like my EE too ! My EE laid big from the get go also. In fact, my second EE just started laying and I can't tell the difference between their eggs. One was molting when the other started to lay so I won't be able to compare color and size until I actually get two blue eggs the same day.