Currently you can specify the pageSizeOptions in EuiInMemoryTable (and most likely others), which will always show the page size options select box or when not specified not having pagination at all.

To rebuild our current table vis using EUI, we would require to configure the page size from the outside without showing the options. I think we could create another parameter, like fixedPageSize or more implicitly pageSizeOptions using a numeric value instead of an array, that will cause the table not to show the page size selector, but always use this page size.

TL;DR: Option to use pagination with a specified page size, without showing the select box below it :-)