Wondering if the band size rec is correct?

Hi lovelies,

Just wondering how my underbust measurements - 78 loose, 76 snug, 75 tight, in cm - have led to me getting a 65 band measurement? I've worn a 70 band since I was a teen (I'm 28 y/o now) and am remeasuring since I gained some weight and have definitely gone up in cup size. A 70 already feels veryyy snug on me at the moment, so I'm just wondering if a 65 would be correct, especially since I've actually gained weight and would be expecting a bigger band especially with these measurements.

I can't add a picture for some reason, but the measurements are as follows:

• Loose underbust: 78 cm
• Snug underbust: 76 cm
• Tight underbust: 75 cm
• Standing bust: 97 cm
• Leaning bust: 102 cm
• Lying bust: 96 cm

Recommended starting size: 65J EU.

Thank you!