Hi,

yes, you can use an ordinary tape - some MUAC tapes for adults do not have colour codes on them anyway, so an ordinary tape would not be that different from some adult MUAC tapes. The tape can be similar to those used by a tailor for measurements, but make sure it is not made of a material that can stretch! UNICEF can usually supply adult MUAC tapes. It depends which country you are in. Im not aware of all the supply chains around, so maybe some in-country can advise you.