You have noting to worry about, the left testicle most of the time is slightly larger then the left. This is normal.
All the best.
In normal physiology also, there is a difference in size of both the testicles. There is nothing to worry about and it is present in all males. The left testicle is slightly bigger and hangs at a lower level. However if there is massive difference then hydrocele has to be ruled out.
Hope it helps. Take care and regards.
Thank you for your help. Being a first time mother is a little hard because I dont know much. But I am learing as I go. Thanks again this really takes that worry away.