There are two different layouts you can choose from when displaying pieces on your Public Profile: Tile View and Grid View. The default view in Artwork Archive is Tile View.
Choosing Grid or Tile View:
Navigate to My Profile on the left-hand menu.
Select Public Settings at the top.
Scroll down to Data Settings and select Grid View Layout or leave deselect for Tile View.
Note: Grid View will have more empty space but will preserve perfect ordering, unlike the default Tile View, which adjusts the order of pieces based on how they fit into the layout.
Example of Tile View:
Example of Grid View: