Select

@formField('select', [
    'name' => 'office',
    'label' => 'Office',
    'placeholder' => 'Select an office',
    'options' => [
        [
            'value' => 1,
            'label' => 'New York'
        ],
        [
            'value' => 2,
            'label' => 'London'
        ],
        [
            'value' => 3,
            'label' => 'Berlin'
        ]
    ]
])

Option	Description	Type/values	Default value
name	Name of the field	string
label	Label of the field	string
options	Array of options for the dropdown, must include value and label	array
unpack	Defines if the select will be displayed as an open list of options	true false	false
columns	Aligns the options on a grid with a given number of columns	integer	0 (off)
searchable	Filter the field values while typing	true false	false
note	Hint message displayed above the field	string
placeholder	Text displayed as a placeholder in the field	string
required	Displays an indicator that this field is required A backend validation rule is required to prevent users from saving	true false	false
default	Sets a default value if empty	string
disabled	Disables the field	boolean	false

A migration to save a select field would be:

Schema::table('posts', function (Blueprint $table) {
    ...
    $table->integer('office')->nullable();
    ...
});

When used in a block, no migration is needed.