Excess sodium and not enough water can easily cause you to bloat everywhere, including your fingers. Its very possible that your fingers are carrying some extra chub but the good news is as you lose weight your fingers will thin out as well
I used to have stumpy sausage fingers and I envied women with long, slim elegant fingers. Now my fingers are long and slim looking, the fat loss has made them appear longer. Just keep on track and your fingers WILL slim down