UK firms are warning that new taxes on sending low-value parcels to the US are bringing uncertainty and potential price hikes for their businesses.
US President Donald Trump cutting the "de minimis" exemption means parcels valued under $800 (£592) will be subject to tax from Friday.
The Federation of Small Businesses has warned this will push up costs and create new barriers for small firms in the UK trying to compete with bigger brands.
"I knew it was going to be an absolute chaotic mess," said Helen Hickman, who has stopped shipping wool to the US due to uncertainty about the costs.
Her hand-dyed wool company, Nellie and Eve, in Carmarthenshire, west Wales, used to make about 30% of its sales to the US - but she has put them on hold.
