Metallic　glasses　(MGs)　normally　plastically　deform　via　severe　strain　localization　in　the　form　of　shear　banding　at　room　temperature.　Here　we　show　that,　in　the　event　of　much　delayed　shear　banding,　submicron-scale　MG　specimens　can　elongate　homogeneously　in　tension　to　a　uniform　plastic　strain　as　large　as　12%　before　failure,　plus　an　estimated　elastic　strain　of　similar　to　5%,　at　a　temperature　close　to　room　temperature　(below　70　degrees　C).　This　high　deformability　of　MGs　well　below　the　glass　transition　temperature,　revealed　in　situ　using　tensile　testing　inside　a　transmission　electron　microscope　and　specimens　prepared　via　focused　ion　beam　micromachining,　is　attributed　to　the　suppression　of　shear　banding　instability　due　to　the　nanoscale　samples　together　with　a　sample　frame　design　that　imparts　high　effective　machine　stiffness　and　confinement.　We　also　point　out　that　the　pronounced　＂homogeneous＂　deformation　reported　here　is　a　form　of　non-localized　deformation　that　is　different　from　the　homogeneous　viscous　flow　for　superplastic　forming　at　high　temperatures　(in　the　supercooled　liquid　state),　and　from　the　intrinsic　tensile　ductility　(stable　uniform　elongation)　resulting　from　inherent　strain　hardening　and　strain-rate　hardening　mechanisms　in　free-standing　conventional　crystalline　metals　under　uniaxial　tension.　(C)　2011　Acta　Materialia　Inc.　Published　by　Elsevier　Ltd.　All　rights　reserved.