International business shipping to Estonia

Good afternoon. I am with In Line Business Support LLC and we need to find an affordable way to ship to Estonia. We are in Tuja, Latvia and have clients coming on board in the next few weeks that are based in Pamu, Estonia. We are going to want to ship them things like a welcome packet, flyers and brochures, marketing materials and proposals, etc. All of the shipments will not be of an incredible monetary value, but we would like to get insurance on them none the less so that in case they are lost or damaged, your shipping company will be liable for the damages and replacements. We hope this is a moot point, obviously, but would still like to get some insurance. Please let me know what sort of shipping speeds we are looking at for this International shipping and if we have any options available in that regard.