I don't know if anyone has caught this yet, but you can resize your pictures right here on these boards.
First put your stuff up in the HTML part.
then click the design tab.
click the picture.
go to the top right corner and look for one of the squares on the picture.
move the square a little and you will see the picture shrink, or grow.
IF you are really specific, you can click back on the HTML tab, and you will notice you now have changed the existing HTML,
the big numbers are actually your dimensions.
as long as you remember that the larger number is your width and the other is your height, you should have no problem deleting the number and inputting the size you want.