u/Fuzzy-Draw603

Ummmm…...i am very surprised!
Does this sound right? I measured twice with a fabric measuring tape. For reference I am 5'5"
230 Ibs. I have been operating on the fact that I am heavy with a small cup size. I've been looking at bras that are 44b/c. Help me understand and I will be forever grateful!
Calculator
Loose Underbust: 42.5
Snug Underbust: 41.5
Tight Underbust: 39.5
Standing Bust: 49.5
Leaning Bust: 52
Lying Bust: 51
Sizing System: US/Canada
Units: inches
I was Assigned female at birth
Suggested Starting Size: 40J/K US