I had a look for covers, and I could only find silicone (?) or plastic sleeves and the 'handbag straps'. I think / suppose a lot of people just have their phone

I had a look for covers, and I could only find silicone (?) or plastic sleeves and the 'handbag straps'. I think / suppose a lot of people just have their phone in their hand or on a table all the time, so why make it pocket sized?