Does PCIe x1 mean a standard height and full length?

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That “x16” is a specification referring to either the x16 PCIe slot form factor or a full x16 lanes of PCI Express bandwidth (

Most computers made after 2005 come with PCI-E slots These can be difficult to identify, as the length of the slot can vary These PC Talk Forum I see various mobos with, for example, 'half-length' PCIe x16 slots But this is a contradiction in terms A PCIe x16 slot by

slot casinos *When using a PCIe x16 add-on card, the length of the card must not exceed 167mm or inches Automated Inspection Machine Application  1) Mechanical Lane requirement: the type of PCIe slot required by the card “x8 x16”