The group screenshots are each collection reward set. A female human rogue provides a sizing comparison for the item's default size. Very large items (trees and rocks) are repeated sized to as small as they can be made. Some items are also shown in an alternate view (i.e. table tops). Lower on the page are screenshots for individual items with their names.
The full post for all the Collections with house item rewards: https://rijacki-game.blogspot.com/2022/07/Collection-HouseItems.html
The screenshots of individual items are from the preview window from the reward preview. For very dark items on the black preview background, I have lighten the screenshot to make the items more viewable. You can use the View Reward button on the Achievement window in game to twist and turn the items to see other angles.