Apparel items such as leggings, sports bras, shirts, backpacks, etc ship directly from our manufacturer in California thus we cannot combine shipping with tails. Mermaid tails, adult linden monofins, sticker, scale, and tops ship from our studio in North Carolina and can be combined to ship together. If you would like to combine your shipping, please email the team at info@finfolk.com with both order numbers to combine. We do our best to ship combined orders together but occasionally this is not possible due to box size, because one item is ready far before the other, or a variation of other circumstances and we cannot guarantee combinations for separately purchased items. Fabric tails from one collection may not be combined with fabric tails from another collection or tails of the months