These badges are DTF (direct to film) printed so will last and not crack like a htv or iron on transfer.  They are easy to apply with either an iron or heat press and no special requirements are needed for laundering the garment, just follow the garment's washing instructions.
 
Badge size is 8cm x 7cm and includes a white box around it, this can be cut around if not required, to have just the heart without the white box.