{% set thumbSizes = [30, 60, 100, 200] %}
{% set srcset = "" %}
{%- for size in thumbSizes -%}{% set srcset = srcset ~ ", " ~ asset.thumbUrl(size) ~ " " ~ size ~ "w" %}{%- endfor -%}
{% set srcset = srcset|trim(", ") %}

<div data-editable-image=""
     data-image-width="{{ asset.width }}"
     data-image-height="{{ asset.height }}"
     class="element small hasthumb"
     data-type="craft\elements\Asset"
     data-id="{{ asset.id }}"
     data-site-id="{{ asset.siteId }}"
     data-status="{{ asset.status }}"
     data-label="{{ asset.title }}"
     data-url="{{ asset.url }}"
     data-level="{{ asset.level }}"
     data-editable
>
    <div class="elementthumb">
        <img sizes="30px" srcset="{{ srcset }}" alt="">
    </div>
    <div class="label">
        <span class="title">
            {{ asset.title }}
        </span>
    </div>
</div>