Joint mats, set of 36, thickness 1cm~ Ivory × 18 sheets Brown × 18 sheets With non-slip processing I bought these when my child was small to put on the floor indoors so they wouldn't get hurt if they fell. I no longer need them, so I'm giving them away. Although the number of sheets is the same, the brown ones are thinner, possibly due to aging. There are variations in thickness. There is fading, stains, and scratches from aging, and there are dents in some areas because heavy kitchen toys and chests were placed on them (see photos). I have only used them indoors, but please check the photos for the worst of the stains on the back. Some are less damaged. I think they would be fine for use outdoors, in a warehouse, or in a garage. If you don't mind, you can also use them indoors. I quickly brushed off the dust on the back, but many of the connecting parts are not clean. If you don't mind that they haven't been thoroughly cleaned, please consider purchasing. I will dispose of them if there are no purchases within a certain period, so please contact me as soon as possible if you are interested! Please purchase only if you understand and agree to the above.