I do not see a good reason why height, width, length are integers.
It has been introduced in 2015 here: 2ff3749064 https://github.com/odoo/odoo/pull/9994
Having float is better : it's allow more expressiveness and is less prone to errors for our users.
closes odoo/odoo#85268
Signed-off-by: William Henrotin (whe) <whe@odoo.com>