This hairband is suitable for a Octicon hearing aid that has velcro fittings. Once you have placed an order then please message me to request the material you would like from any of those listed within my website with the product number page called Boys Fabrics.Also I will need a circumference measurement of your childs head along their hairline around to the back of the head and ear to ear measurements. Please email me if you require detailed instructions (see photo above)