Product compliant and very good, a little small but effective

The product is of good quality, the 3M double sided adhesive used is effective, plasticized red and white coating is flexible enough not to damage upon impact of amortization. The foam used is both very dense and capable of some flexibility, but the product is rigid overall. Hence this small downside to installing the ceiling of my car in the cold season: the product is curled slightly in the direction of the length, which does not help to maintain the glued on a flat support.
Please note finally that the dimensions are those given in the product, mails should be the unit is specified. It measures L 35 x W 20 x H 4 cm (so it corresponds to 200 x 350 x 40 as shown ... but specify measure, these are mm!) Knowing that the other details of the product of Amazon Other "Product sizes" are who have nothing to do: is it the packaging dimensions included, I do not know, but it's disturbing ...