This should be true of all menu components:

1. Width

The menu should display at the width of the emitting element. Right now, it's sized to the string length of the menu items. 

2. Auto-scrolling to selected item in menu

I'm not currently seeing this behavior in our implementation. See video from material spec: https://storage.googleapis.com/spec-prod-media/quantum006/0B6Okdz75tqQsUWtQaDc0MnJOUmc/Components-Menus-Usage-Textfield_Dropdown_xhdpi_006.webm

3. Hover 

We should have hover states within the menu, using #F2F2F2 as stated here 
https://folio.googleplex.com/chrome-ux-specs-and-sources/Chrome%20Inner%20Pages/03-Settings/specs#%2FSPEC-settings_menu.png%3Fz=width

4. Density

We should be using dense spec to determine row height. 
https://folio.googleplex.com/chrome-ux-specs-and-sources/Chrome%20Inner%20Pages/03-Settings/specs#%2FSPEC-settings_menu.png%3Fz=width