center: The SOL Sport Utility Blanket is also small and it could fit in a cargo pocket.
right: The Snugpak Stasha is the same size as the others, however, folding is not recommended as it will compromise the fabric and even so it does not fold to the same as the SOL. It's also heavier and more expensive.
left: the SOL emergency bivy can actually be folded to half it's size.
inside-left: the SOL emergency bivy XL
inside-right: SOL thermal bivy
right: 2gosystems bivy - very heavy and huge.
The truth in the matter is more noticeable in the ponchos.
left: SOL poncho with thermal reflection material (embrace the rain but stay warm doing it)
center: sea to summit ultra-sil tarp poncho - expensive and delicate
right: although this is the same bivy as above the 2gosystems-BOB is actually about the same size.