WordPress Raindrops Theme. Featured icon size chenge. on index,archives. paste only between code paste start and code paste end.　ver 1.336 after.

functions.php

<?php
// code paste start
add_image_size( 'archive_featured_icon', 100, 50, true );// 100 is width(px）　50 is height(px)
add_filter('raindrops_post_thumbnail_size_main_query','my_post_thumbnail_size_custom' );
add_filter('raindrops_embed_meta_css', 'my_archive_thumbnail_size_custom_style' );

function my_post_thumbnail_size_custom( $size ) {

		return 'archive_featured_icon';

	return $size;
}

function my_archive_thumbnail_size_custom_style( $css ) {

		$image_size = my_get_image_sizes('archive_featured_icon');

		$custom_style = '.tag .h2-thumb, .category .h2-thumb, .rd-featured-no-front .h2-thumb, .rd-featured-no-left .h2-thumb,.rd-featured-no-front .h2-thumb, .rd-featured-no-left .h2-thumb{
			width: '.absint( $image_size ['width'] ).'px;
		}
		.tag .h2-thumb .wp-post-image,.category .h2-thumb .wp-post-image, .rd-featured-no-front .h2-thumb .wp-post-image, .rd-featured-no-left .h2-thumb .wp-post-image,.paged .h2-thumb .wp-post-image, .paged .h2-thumb .wp-post-image{
			width:'.absint( $image_size ['width'] ).'px;
		}';		
		$custom_style .= '.rsidebar .h2-thumb,.lsidebar .h2-thumb,#ft .h2-thumb,.topsidebar  .h2-thumb,
			.rsidebar .h2-thumb .wp-post-image,.lsidebar .h2-thumb .wp-post-image,#ft .h2-thumb .wp-post-image,.topsidebar  .h2-thumb .wp-post-image{
			width:auto;
		}';

		return $css. $custom_style;
}
function my_get_image_sizes( $size = '' ) {
		/* @see https://codex.wordpress.org/Function_Reference/get_intermediate_image_sizes */
        global $_wp_additional_image_sizes;

        $sizes = array();
        $get_intermediate_image_sizes = get_intermediate_image_sizes();

        // Create the full array with sizes and crop info
        foreach( $get_intermediate_image_sizes as $_size ) {

                if ( in_array( $_size, array( 'thumbnail', 'medium', 'large' ) ) ) {

                        $sizes[ $_size ]['width'] = get_option( $_size . '_size_w' );
                        $sizes[ $_size ]['height'] = get_option( $_size . '_size_h' );
                        $sizes[ $_size ]['crop'] = (bool) get_option( $_size . '_crop' );

                } elseif ( isset( $_wp_additional_image_sizes[ $_size ] ) ) {

                        $sizes[ $_size ] = array( 
                                'width' => $_wp_additional_image_sizes[ $_size ]['width'],
                                'height' => $_wp_additional_image_sizes[ $_size ]['height'],
                                'crop' =>  $_wp_additional_image_sizes[ $_size ]['crop']
                        );
                }
        }

        if ( $size ) {

                if( isset( $sizes[ $size ] ) ) {
                        return $sizes[ $size ];
                } else {
                        return false;
                }
        }
        return $sizes;
}
// code paste end
/**
 *
 *
 * @package Raindrops
 * @since Raindrops 0.1
 */
if ( !defined( 'ABSPATH' ) ) {
	exit;
}