diff --git a/libs/gfx/include/psemek/gfx/renderbuffer.hpp b/libs/gfx/include/psemek/gfx/renderbuffer.hpp
index 86ed9c43..483366ff 100644
--- a/libs/gfx/include/psemek/gfx/renderbuffer.hpp
+++ b/libs/gfx/include/psemek/gfx/renderbuffer.hpp
@@ -2,6 +2,7 @@
 
 #include <psemek/gfx/gl.hpp>
 #include <psemek/gfx/pixel.hpp>
+#include <psemek/geom/vector.hpp>
 
 #include <cstddef>
 
@@ -30,6 +31,11 @@ namespace psemek::gfx
 
 		void reset();
 
+		geom::vector<std::size_t, 2> size() const { return size_; }
+
+		std::size_t width() const { return size_[0]; }
+		std::size_t height() const { return size_[1]; }
+
 		void storage(GLenum internal_format, geom::vector<std::size_t, 2> const & size);
 
 		template <typename Pixel>
@@ -40,6 +46,7 @@ namespace psemek::gfx
 
 	private:
 		GLuint id_;
+		geom::vector<std::size_t, 2> size_ = {0, 0};
 
 		explicit renderbuffer(std::nullptr_t);
 	};
diff --git a/libs/gfx/source/renderbuffer.cpp b/libs/gfx/source/renderbuffer.cpp
index 7b85639e..de42b33c 100644
--- a/libs/gfx/source/renderbuffer.cpp
+++ b/libs/gfx/source/renderbuffer.cpp
@@ -51,6 +51,7 @@ namespace psemek::gfx
 	{
 		bind();
 		gl::RenderbufferStorage(target, internal_format, size[0], size[1]);
+		size_ = size;
 	}
 
 	renderbuffer::renderbuffer(std::nullptr_t)