A covering sheet for covering a skin adhesive surface of a device for holding a tracheostoma device over a tracheostoma of a patient may include a central/medial element for covering the central/medial part of the skin adhesive surface of the device. The covering sheet may include first and second elements arranged laterally of the central/medial element. Lateral peripheral borders of the central/medial element may be positioned adjacent medial peripheral borders of the first and second elements. The peripheral borders may be defined by division lines.