When they made Uncharted: Golden Abyss(2011) they had a core team of 55 people and they outsourced a lot.*
Since then they grew in size, I guess.
*According to the Uncharted: GA Post Mortem:
http://www.gamasutra.com/view/feature/181082/postmortem_sony_bend_studios_.php
From their site:
Founded in 1994, Bend Studio
is a team of over 40 veteran engineers, artists, designers, and support staff who are dedicated to excellence and innovation.
Not sure when it was last updated, but Bend have always been a fairly small studio and Sucker Punch are around 120 now. So no, they are not bigger than Sucker Punch.