Right click on any individual image and click on "save as" to keep specific images (at reduced size). Or, select "download" at the top, to download a zip file of the whole album. The photos in the album are at their original, full sizes.
Downloaded file size: 135MB. (It might take a minute or two to fully download.)
It should also be noted that these pictures were organized in the order they were taken and not necessarily by dimension, hence the size disparity between shots. :D