The 40J's band is a lot longer than the 38JJ bra.
Bra Size Comparison Chart
Elomi Beatrice Nursing Bra for moms with large cups!
The Best Nursing Bras
Elomi Beatrice Nursing Bra for moms with large cups!
The 10 Best Nursing Bras Tested by Real Moms
I Swore By This Comfy Bra for Pregnancy and It's On Sale
Elomi Beatrice Nursing Bra for moms with large cups!
The 10 Best Nursing Bras Tested by Real Moms
Bra Size Comparison Chart
Choosing the Right Nursing Bras for Your Body