Given the JSON object $\{"$sku$"$: $"$VA$-43",$ "size": $"5$ft$",$ "name": "Blue Sky$",$ "description": "A great product!"$\}$ Change it to match the following spec:

$1.$ All values must be lowercase.

$2.$ Values may contain only alphanumeric characters, underscores or dots. All other characters must be replaced with underscores.

$3.$ "description" is a special property, to which none of the above specifications apply.

$4.$ If any value has more than $10$ characters, trim it at $10$ characters and add three trailing dots.

$5.$ Convert imperial units into metric. For distance, use meters.

Write the transformed object in the text box below: