tildECOr 7cm Length Curtain Spacers - 12 Pack Curtain Spacers for Eyelet Curtains Suitable for Poles up to 35mm Diameter : Amazon.co.uk: Home & Kitchen
Curtain Spacer Tapes
3D Printed Curtain spacers x12 , Mrs Hinch durable, NOT FOAM perfect pleats | eBay
BIPPS 24 Pack Curtain Spacers For Poles up to 28mm | by Bay Interiors
Curtain Spacers BIPPS Perfect Pleats 12 Pack for Poles up to 28mm | eBay
Mrs Hinch fans use toilet rolls to make their curtains hang straight – and people are saving up loo rolls to try it | The Sun