[#bsl-unordered_multiset-06c-size] = xref:bsl.adoc[bsl]::xref:bsl/unordered_multiset-06c.adoc[unordered_multiset]::size :relfileprefix: ../../ :mrdocs: Return the number of elements in this unordered multiset. == Synopsis Declared in `<bslstl_unorderedmultiset.h>` [source,cpp,subs="verbatim,replacements,macros,-callouts"] ---- xref:bsl/unordered_multiset-06c/size_type.adoc[unordered_multiset<KEY, HASH, EQUAL, ALLOCATOR>::size_type] size() const noexcept; ---- [.small]#Created with https://www.mrdocs.com[MrDocs]#