For something like that, I’d definitely think about the occasion first and then look at the available arrangements. A bouquet of 100 roses is quite a statement, so it makes sense to consider whether the recipient enjoys larger floral gifts. While comparing options for Dubai, I came across https://mireya.ae/catalog/dubai/100-roses/. Looking at the arrangement beforehand helped me get a better idea of how a large bouquet is presented. I’d also pay attention to delivery information and the address, because receiving a large arrangement may require a little more planning than receiving a small bouquet. Personally, I’d rather organise those details in advance than leave them to the last minute.