How to get information from a dropdown

Describe the problem.

Url: Bedding | Bed Linen, Bed Sheets & Duvet Covers | Next Official Site

Sitemap:
{"_id":"next_alkaram","startUrl":["Bedding | Bed Linen, Bed Sheets & Duvet Covers | Next Official Site h1","multiple":false,"delay":0,"regex":""},{"id":"size_wrapper","parentSelectors":["name"],"type":"SelectorElementClick","clickElementSelector":"div.DropDown:not([style="display: none;"]) div.formControls div.dk_options a:not(:contains("Choose Size"))","clickElementUniquenessType":"uniqueCSSSelector","clickType":"clickOnce","delay":500,"discardInitialElements":"discard-when-click-element-exists","multiple":true,"selector":"body"},{"id":"price","parentSelectors":["size_wrapper"],"type":"SelectorText","selector":".nowPrice span","multiple":false,"delay":0,"regex":""},{"id":"size","parentSelectors":["size_wrapper"],"type":"SelectorText","selector":"#dk_container_Size-519-050 a.dk_toggle","multiple":false,"delay":0,"regex":""}]}

Please find the following sitemap.
I am having trouble getting information from the size dropdown (single, double, king, super king) The element preview is coming on the right element but the data is not being extracted. Please help. Thank you.

@fabiha Hi.

After inspecting the HTML of this website, it seems that there are several hidden dropdowns.
In order to extract the desired data, try to specify the click and 'Text' selectors(that will target the active option).

Practical example:

{"_id":"next-co-uk","startUrl":["https://www.next.co.uk/g798170s1/871577#871577"],"selectors":[{"clickElementSelector":"div.DropDown:not([style=\"display: none;\"]) div.formControls:visible div.dk_options a:not(:contains(\"Choose Size\"))","clickElementUniquenessType":"uniqueCSSSelector","clickType":"clickOnce","delay":1200,"discardInitialElements":"discard-when-click-element-exists","id":"size-click","multiple":true,"parentSelectors":["_root"],"selector":"html","type":"SelectorElementClick"},{"delay":0,"id":"size","multiple":false,"parentSelectors":["size-click"],"regex":"","selector":"div.DropDown:not([style=\"display: none;\"]) div.formControls:visible .dk_option_current a:not(:contains(\"Choose Size\")) ","type":"SelectorText"}]}