The extent of the shadow when the Messenger of Allah prayed (the noon prayer) was three to five feet in summer and five to seven feet in winter.  

كَانَتْ قَدْرُ صَلاَةِ رَسُولِ اللَّهِ ﷺ فِي الصَّيْفِ ثَلاَثَةَ أَقْدَامٍ إِلَى خَمْسَةِ أَقْدَامٍ وَفِي الشِّتَاءِ خَمْسَةَ أَقْدَامٍ إِلَى سَبْعَةِ أَقْدَامٍ  

The extent of the shadow when the Messenger of Allah prayed (the noon prayer) was three to five feet in summer and five to seven feet in winter. (Using translation from Abū Dāʾūd 400)   

«كَانَ قَدْرُ صَلَاةِ رَسُولِ اللَّهِ ﷺ ثَلَاثَةَ أَقْدَامٍ وَفِي الشِّتَاءِ خَمْسَةُ أَقْدَامٍ إِلَى سَبْعَةِ أَقْدَامٍ»  

"The Prophet ﷺ prayed Zuhr when the length of (a person's shadow) was between three and five feet in summer, and between five and seven feet in winter." (Using translation from Nasāʾī 503)  

«كَانَ قَدْرُ صَلَاةِ الظُّهْرِ مَعَ رَسُولِ اللهِ ﷺ فِي الصَّيْفِ ثَلَاثَةَ أَقْدَامٍ إِلَى خَمْسَةِ أَقْدَامٍ وَفِي الشِّتَاءِ خَمْسَةَ أَقْدَامٍ إِلَى سَبْعَةٍ»  

The extent of the shadow when the Messenger of Allah prayed (the noon prayer) was three to five feet in summer and five to seven feet in winter. (Using translation from Abū Dāʾūd 400)  

كَانَ «قَدْرُ صَلَاةِ رَسُولِ اللهِ ﷺ الظُّهْرَ فِي الصَّيْفِ ثَلَاثَةَ أَقْدَامٍ إِلَى خَمْسَةِ أَقْدَامٍ وَفِي الشِّتَاءِ خَمْسَةَ أَقْدَامٍ إِلَى سَبْعَةِ أَقْدَامٍ»  

[Machine] The prayer of the Messenger of Allah ﷺ used to be three to five units in the summer, and five to seven units in the winter. This is mentioned in the hadith of Abu Dawood and is a matter that varies in different countries and regions, and it is estimated in each region according to its known practice for determining the timing of the disappearance of sunlight.  

كَانَ قَدْرُ صَلَاةِ رَسُولِ اللهِ ﷺ فِي الصَّيْفِ ثَلَاثَةَ أَقْدَامٍ إِلَى خَمْسَةِ أَقْدَامٍ وَفِي الشِّتَاءِ خَمْسَةَ أَقْدَامٍ إِلَى سَبْعَةِ أَقْدَامٍ لَفْظُ حَدِيثِ أَبِي دَاوُدَ وَهَذَا أَمْرٌ يَخْتَلِفُ فِي الْبُلْدَانِ وَالْأَقَالِيمِ فَيُقَدَّرُ فِي كُلِّ إِقْلِيمٍ بِالْمَعْرُوفِ بِهِ بِأَمْرِ الزَّوَالِ