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Add image sizes to WordPress

Heres how to add more image sizes to WordPress.

This goes in your theme’s functions.php file:

if ( function_exists( 'add_image_size' ) ) {
  // Non cropped tall thumb with 3:4 ratio
  add_image_size( 'tall_thumbnail', 80, 107 );

  // Small 30x30 cropped thumb
  add_image_size( 'tiny_thumbnail', 30, 30, true );
}

Here’s what the parameters do:

$name

Image size identifier.

$width

Image width in pixels. Default 0.

$height

Image height in pixels. Default 0.

$crop

Image cropping behavior. If false, the image will be scaled (default), If true, image will be cropped to the specified dimensions using center positions. If an array, the image will be cropped using the array to specify the crop location. Array values must be in the format: array( x_crop_position, y_crop_position ) where:

• x_crop_position accepts: 'left', 'center', or 'right'.
• y_crop_position accepts: 'top', 'center', or 'bottom'.

Default value: false