kg's VS cm's

Hi guys, I was just wondering :
To date, I've lost 7kg (15.43lb) but only 18.5cm (7.3inch) all-round. This maybe sounds good, but to take it into retrospect - even though I've lost quite a few kg's, I've barely dropped 1 dress size?
This just sounds strange to me. In my previous weight-loss attempt, it was the other way around - I lost something like 30cm (11.8inch) all-round, but only 1kg (2.2lb).
Does this make sense? What do you think?
What bugs me most is, I've always struggled to lose weight, and now I'm finally doing it, the healthy way, but as soon as I talk to people regarding weight-loss, and I tell them I've lost 7kg, some of them respond by saying "wow, you'd think you would be able to see a difference for that amount of kg's" :explode:
Thanks!!
:flowerforyou: